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1、人教版小学二年级数学上册加减乘除法口算题全套二年级口算题 11+1= 22+2= 34+10= 44+5= 34+8= 51+9= 42+6= 53+9= 54+7= 36+6= 29+9= 54+7= 11+2= 11+3= 23+2= 24+2= 27+2= 35+3= 36+4= 63+3= 64+3= 65+3= 62+8= 45+5= 46+5= 42+9= 45+8= 53+6= 55+6= 54+7= 59+6= 19+2= 18+3= 17+6= 39+3= 34+10= 36+4= 28+4= 27+8= 26+9= 45+5= 6= 42= 21?3= 36?4= 24?1
2、?1= 62= 36= 5?5= 56?7= 55= 6?2= 9?3= 56+41= 36?6= 72?8= 10?5= 90-45= 56?7= 24?3= 9?9= 7052= 24?4= 16?2= 45= 24?8= 27?3= 49?7= 15?5= 42?6= 14?7= 10?2= 27?9= 18?2= 8?4= 6?1= 54?6= 99= 51= 56?8= 15?3= 20?4= 72?9= 45-39= 36?9= 36?6=36?2= 49?6= 34?2= 36?3= 45?5= 12?6= 18?6= 24?8= 48?6= 66= 14= 18= 36?6=
3、46= 1 54?6= 35?7= 64?8= 99= 9?1= 77= 23= 24?6= 27?9= 18?9= 51= 42?7= 63?7= 57= 11= 16= 45?9= 85= 18?9= 42?6= 56?8= 30?6= 43= 83= 24?8= 21?7= 49?7= 16?8= 9?3= 36?4= 28?7= 92= 72?8= 72?9= 63?7= 73= 56?7= 27= 81?9= 124= 25= 45?9= 76= 2?1= 42?6= 54?6= 94= 12?2= 53= 19= 28= 56= 49= 26= 54?9= 20?4= 62= 12
4、?4= 64?8= 63= 47= 32?8= 58= 33= 31= 49?7= 15= 6?3= 54= 96= 10?2= 48?8= 79= 32= 64= 30?6= 27= 63?7= 16?8= 44= 37= 48= 32?8= 23+17= 65= 38= 26= 85= 16?4= 97=81= 63?7= 93= 73= 28?7= 54?6= 89= 54?93= 99= 40?8= 7?1= 85= 69= 16?4= 66= 88= 40?8= 30?6= 77= 63?94= 2 74= 81?9= 63+24= 4?4= 20?4= 36= 92= 56?89=
5、 57= 9?1= 78= 25+41= 36?6= 36?9= 98= 24?6= 56?76= 95= 42?7= 18?3= 75= 14?2= 35?7= 12?3= 8?1= 24?3= 35?7= 27?3= 59= 168=9?9= 72?8= 27?9= 24?4= 80-46= 16?2= 98= 20?4= 18?9= 10?5= 71-68= 52+35= 36= 99= 42?6= 8?4= 30?6= 72?9= 72= 6?1= 15?3= 14?2= 15?5= 22= 18?2= 93= 62= 49?7= 30?6= 65+26= 45+45= 6?2= 94
6、= 14?2= 56= 59= 49?7= 9?3= 36?9= 78= 66+26= 10?2= 97= 35?5= 64= 55+52= 54?64= 42?66= 56+41= 54?6?3=8?8= 85-62= 21?3= 35?5= 30?5= 48= 20?5= 58= 49?6= 18?3= 75-64= 65= 28?7= 21?7= 52= 21= 40?5?2= 54= 38= 48?6= 8?8= 16?8= 24?8= 8?2= 42+36= 32?4= 50+40= 67= 48= 8?1?4= 3 25?5= 81?9= 43= 47= 12?2= 36= 90-
7、65= 35?7= 78-19= 63?9= 28?4= 25+41= 45= 49= 38= 55= 14?7= 41+25= 36+24= 12?4+91?1= 42?7= 41= 42?6= 39= 55= 64?88= 10?5= 63?9= 18?3= 72?8= 92= 42= 49= 89= 81?9= 8?4= 18?2?3= 25?58= 28?4= 82= 49?7= 95= 65= 91= 18?9= 45-6= 14?2= 30?5= 8?18= 27?9= 10?2= 46= 66= 36= 27?3= 36= 15?5= 40?5= 28?7= 34= 9?3= 2
8、1?3= 87= 24?8= 27?99= 86= 84= 16?8= 39= 5?1= 4?1= 24?4= 36+42= 20?5= 43= 99+12= 87= 21?3= 41= 15?3= 72?9= 24?6= 42= 12?3= 18?2= 45= 37= 48?64= 49= 86= 36?4= 35?5= 8?8= 81?9= 4?2= 45?5= 32?4= 21?7= 57-20= 62= 39+45= 38= 35= 25+41= 6?2= 30?6= 6?3= 8?2= 14?7= 4 姓名:_班级:_分数:_ 1、口算: 38，4= 23= 36= 24，26= 9
9、0,18= 72,18= 45,20= 66= 45= 40，26= 23，56= 78，22= 23= 100,80= 97,9= 64= 6，22= 53= 12，67= 15，34= 62= 31,2= 73,8= 36= 0，69= 44= 53= 75,25= 54= 70,50= 43= 64= 45，5= 87,25= 56= 33= 21,18= 43= 60,13= 63，8= 42,19= 37，5= 46，9= 37,8= 52= 18，56= 55-17= 8,29= 38，24= ( )5=30 26= 62，9= 33，12= 16，69= ( )4=20 ( )6
10、=24 2( )里最大能填几, ( )5, 22 ( )2,9 4( ), 10 6( ),27 3( ),13 ( )5, 26 7( ),58 ( )4,35 ( )4,18 9( ),28 ( )8,30 ( )6,50 5 1) 1000-600= 2) 440-40= 3) 43+17= 4) 150-80= 5) 20+90= 6) 400+80= 7) 120-50= 8) 18?4= 9) 16?8= 10) 67= 11) 73-38= 12) 18?4= 13) 85-18= 14) 9+65= 15) 70+80= 16) 46-8= 17) 40+70= 18) 63?
11、9= 19) 67= 20) 8+9= 21) 740-40= 22) 600-100= 23) 200+220= 24) 86-60= 25) 30+90= 26) 83= 27) 16?8= 28) 48+52= 29) 35?7= 30) 15-9= 31) 45?9= 32) 700+20= 33) 620-600= 34) 720-700= 35) 64?8= 36) 53= 37) 140-80= 38) 700+20= 39) 47= 40) 63?9= 41) 200+400= 42) 45+26= 43) 6+7= 44) 43+9= 45) 170-90= 46) 620-
12、600= 47) 8+9= 48) 77= 49) 200+90= 50) 39= 51) 150-50= 52) 170-90= 53) 150-50= 54) 53-7= 55) 20+90= 56) 40+90= 57) 34+26= 58) 43+17= 59) 81-9= 60) 400+80= 61) 76= 6 2) 170-90= 63) 42?7= 64) 59-18= 65) 160-80= 66) 50+70= 67) 76= 68) 34+26= 69) 8+9= 70) 15-9= 71) 28?4= 72) 40+800= 73) 72?8= 74) 400+80=
13、 75) 20+90= 76) 52+19= 77) 840-40= 78) 700+20= 79) 57+43= 80) 300+80= 81) 39= 82) 150-80= 83) 40+800= 84) 53-7= 85) 400+80= 86) 57+43= 87) 200+90= 88) 83= 89) 15-9= 90) 70+80= 91) 98= 92) 200+220= 93) 53= 94) 53-7= 95) 200+220= 96) 58+7= 97) 170-90= 98) 20+90= 99) 54?6= 100) 840-40= 6 603, 68，3, 11，
14、86,1, 56+4, 47,11,21, 63?7+19, 72?9,1, 12+28, 59，4,40, 53+75, 81?9-3, 57,13,42, 21+34, 64，61, 92+16, 72,17,24, 85，45, 40?5,5, 6?14, 82,74，72, 92,10, 48?8?3, 26，73,52, 16?20, 51,19,0, 87-8, 06,0, 7，0，94, 80，49, 8?1,4, 3?1+7, 17，71,66, 339, 81?95, 25-2, 30?6?5, 70，31, 30?5，58, 77+2, 16?43, 89,76,11, 6
15、0+56, 35?5+7, 38,7，69, 32?86, 62，26-70, 98,47，0, 4?19, 42?62, 30?5，65, 32?4+8, 42?6+84, 12?4?3, 18?3?6, 91,37，8, 48?8,0, 36?95, 1?1+49, 12?42, 53，65, 24?6?4, 15,1,7, 4，32，51, 61，7,8, 24?6+72, 99,61, 46-5, 1+1-2, 72?8,1, 427, 29?9, 83，69, 45,19, 9?3+9, 32?8+38, 109, 85,14, 28，30，14, 86,73，1, 80，15-52
16、, 23,0,18, 89-72, 70,3，13, 12?2+18, 5?15, 9?11, 53,37,4, 56，41,23, 12?4?3, 28-8, 74，11,16, 9?1，9, 37，68, 48，43,21, 7 24?8,1, 01+0, 16,6,2, 60,11,40, 911, 21?7?1, 99,25, 98-72, 79,73,4, 12?26, 61,50,7, 40?5，82, 20?10，18, 40+19, 82?4, 2?16, 56，31，18, 79，6-23, 59，22,0, 76，12,40, 48?6?8, 58,6, 16?24, 91
17、4, 5?1+23, 62，20,79, 77，9-57, 40?5,4, 36,8,17, 14?79, 8，40，18, 48?8,2, 03+9, 76,39,10, 16?8+2, 24?6,3, 79,1, 65,40,2, 63?9?7, 56?7,7, 12?3+4, 87?1, 92,24，7, 15+9, 44，32,2, 48?8,3, 461, 3?37, 18?23, 46-0, 014?2, 4?13, 12，29, 41，15, 18?3+22, 45?9,4, 77-2, 21?7,0, 06+0, 54,35,4, 28?4+28, 36?9-4, 28?44,
18、 27?9-3, 8?8，13, 33，9，42, 47+9, 72+10, 49?77, 60，11，5, 16?44, 53,17，6, 99,8，8, 12?6-2, 76-22, 46，31,37, 63-12, 46,24,7, 9?3+9, 2，81,62, 27，19，8, 86-6, 18，83, 08+3, 14?2+43, 39,32,3, 53，39,2, 36?6,1, 422, 05，58, 36?4，23, 25-3, 51,6,10, 8 719, 32-5, 37?3, 36,5, 49?7，52, 11，97, 54，47, 32-2, 92-80,10, 5
19、8,30，65, 40，50, 40?5,1, 2?2+0, 8?8,0, 38,11,6, 52-8, 51,39,5, 18?8, 98-61, 69，12-46, 1?1，52, 68-40, 24?4,3, 34,9, 81+34, 48,16, 72?80, 78,20，3, 8?8，16, 93-24, 40，42,31, 30?6，26, 28?7,2, 30?6，79, 36?47, 22，71-26, 30?5，58, 91，0, 84,63，0, 907, 62+32, 24?4,4, 77-12, 69，9，14, 62，6，17, 97,89，33, 24,13，38,
20、 12?3?4, 30?5，65, 72?8?3, 84，16-5, 73-21, 7，20，7, 3?35, 75,9, 166, 10?2，63, 51+6, 10,14?2, 57,33，45, 30?6，21, 98，8, 258, 64?8,0, 48,43,0, 35，21，23, 01，71, 660, 18，35，4, 64?8-8, 06+3, 23-6, 13，40，7, 10?5,0, 40?5-7, 23，22，2, 10，40,9, 30?5，42, 2，95-79, 21?3-3, 4?1-4, 10?2，60, 92，7,97, 86-8, 37-21, 83,1
21、3,3, 36-3, 30?6-2, 42+33，8, 46,3，20, 14，51,4, 7?1-5, 58-11, 12?2-4, 9 20?5，72, 86,73，12, 127?3, 20?5+5, 14+66, 61+6, 914, 57，8，16, 75-14, 34-3, 6，59，16, 427, 8?1，77, 92，9，2, 16?8,1, 20?4?5, 91,12-34, 81+8, 99-1, 6?3-2, 87-6, 95-13-50, 74,7, 10?5+6, 40?8,4, 40?8-1, 67,53，6, 030, 42?6,2, 10，52, 98，2-3
22、2, 40?59, 65,1，25, 49?7-7, 55,42，78, 54,46,2, 253, 223, 53?5, 18?6?3, 64，6，3, 52+24, 15-5, 98-32-44, 18?6?3, 242, 24-2, 30?69, 98-32-44, 030?5, 24-4, 82，52, 30?59, 70,0, 8?8,0, 53?3, 84-21, 23，53，4, 87,42，5, 11,0, 64?8,0, 79，28, 97-83= 908, 87,42，5,44+14, 42,0, 80，20,1, 73,62,7, 38 = 40?8?1, 44,11,
23、89,1,31, 029, 54+12= 91，7,69, 5?5，34, 93,9-46, 4?2-2, 68-60= 70，2，3, 67-24, 70，34, 73,38,31, 63，1，20, 61,20，57, 44-75 = 228, 21,3，6, 17，16, 10 91-2= 49+16= 38+64= 69+26= 46 = 54-36= 34+58= 38+36= 5+3+17= 82-79= 67+25= 83-7= 42+29= 32+47+3= 24+30+30= 46+11+19= 90-97 = 16-11= 64+28= 83-12= 10+63+7= 51
24、-46= 66+23= 36+53= 73 = 54+16= 46+39= 36+13= 89-40= 85+2+8= 83+14+6= 43+29+11= 42+16= 90-85= 35+14= 40-15= 89-85 = 20+32+28= 37+13+27= 81+1+9= 66+16= 38+39= 92-40= 54+27= 97 = 26+28= 69+26= 39+27= 54+31= 55+25= 82-73= 14+36= 17+28+28= 46+12= 77+10= 39+34= 43-47 = 28+14= 14+62= 21+21= 11 89-76= 64-39
25、= 68+16= 73-52= 24+36= 34+42= 43+29= 13+46+24= 28+39= 15+35= 82-28= 65-0= 32+34+26= 39+35+18= 53+8+12= 16+58+12= 99-86= 75-13= 65-49= 73-67= 8+92= 35+53= 45+5= 69+17= 47+16= 35+36= 61-35= 59+21= 86+8+2= 17+50+10= 1+27+3= 35+46+4= 39+26= 66+14= 43+28= 46+39= 37+61+9= 2+28= 38+43+7= 45+45+5= 51+19= 80
26、+8+2= 59+30+10= 14+39= 62+36= 25+39= 11+49= 39+34= 83-19= 41-40= 40-21= 46+17= 97-39= 71-13= 24+19= 91-75= 54+14= 47-36= 60-49= 60-13= 12 63+8+2= 47+53= 15+19= 76-43= 62+14= 65 = 29 = 95 = 96-26= 24-65 = 34-29 = 42+95 = 25+26+4= 76+24= 55-16= 26+48= 24+34= 71-86 = 61-86 = 81-46 = 85-44= 52+39= 74+18
27、= 87-56= 75+15+5= 75 = 25 = 87 = 11+42+28= 87-75 = 15-25 = 32-81 = 72-46= 34+62= 35+19= 76+16= 18+24+46= 66-67 = 36-33 = 51-73 = 60-46= 53+46= 27+53= 59+17= 69+14= 18 = 85 = 75 = 40+16= 45-18 = 32+85 = 73-75 = 16+27= 67-38= 36+38= 75-46= 9+13= 44-14 = 63-65 = 92-97 = 13 56-26= 57+15= 29+66= 85-36= 7
28、2 = 69 = 65 = 65 = 22-72 = 42+69 = 6+65 = 20-65 = 59+23= 45+36= 64-16= 32+49= 98-26 = 17-53 = 54-56 = 44-75 = 52+17= 49+16= 36+56= 64-25= 34 = 31 = 76 = 44 = 41-34 = 76-31 = 77-76 = 5+44 = 58+14= 55+26= 56+26= 98-53= 54-22 = 63-96 = 48-82 = 89-68 = 25+56= 63-59= 29+39= 38+56= 24 = 43 = 69 = 97 = 63-
29、24 = 92-43 = 67-69 = 82-91 = 24+37= 73-29= 36+45= 31+38= 23-71 = 34-93 = 2-51 = 41-33 = 14 33+53= 86 = 86 = 46 = 91 = 29+67= 55+29= 13+79= 18-91 = 79-56= 64+36= 84-56= 51+29= 95-89= 69+26= 46+37= 68-27 = 42+69 = 6+65 = 60-65 = 46+3= 11 = 33 = 73 = 93 = 56+24= 54+28= 39+21= 69-13 = 65+32= 65+25= 61+2
30、2= 16+38= 80-56= 58-46= 29+42= 98-63 = 76-31 = 77-76 = 5+44 = 14 = 65 = 97 = 69+19= 63 = 66-36= 39+36= 78-56= 83-93 = 84-36= 37+32= 63+28= 80+7= 71+26= 25+57= 52+38= 96-33 = 92-43 = 67-69 = 82-91 = 15 26 = 53 = 11 = 75 = 29+36= 26+56= 46+34= 47-29= 45+25= 26+58= 96-68= 72-56= 36+28= 61+39= 51+28= 43
31、+26= 18-91 = 71-86 = 23-79 = 34-93 = 22 = 96 = 82 = 68 = 80-24= 60-32= 26+69= 49+25= 93-65= 29+74= 69-26= 27+69= 88-56= 64+36= 68-56= 54+42= 69-93 = 98-26 = 17-53 = 54-56 = 11 = 51 = 33 = 71 = 51-15= 69+34= 68-26= 91-73= 97-58= 28+36= 23+68= 41-28= 36+36= 28+58= 19+38= 27+56= 83-93 = 54-82 = 63-96 =
32、 48-82 = 16 86 = 39+36+4= 13+75+5= 39+13+17= 35+37= 13+41= 73-71= 57+28= 49+47= 97-84= 69+22= 20-9= 97-54= 38+37+13= 45+15+15= 34+5+5= 56-93 = 34-26= 53+17= 64+28= 45 = 62+12= 50+28= 22+47= 23+38= 23+11= 90-35= 73+11= 62+19= 64+21+9= 65+12+8= 52+44+6= 51-35= 28+62= 18+25= 16+72= 32+56 = 47+1+39= 56+
33、16+14= 50+2+18= 63-24= 30+22= 74+19= 36 = 98-25= 55+31+9= 45+33+7= 86+8+2= 55-25= 15+47= 50+17= 92-82= 46+45= 39+32= 48-4= 80-54= 30-83 = 71-68= 78+11= 23+29= 17 72+6+4= 57+12+18= 10+81+9= 53+29= 36+22= 57-2= 48-39= 66-6= 64+14= 27+52= 56+29= 43+17= 13+16+54= 54+21+9= 69+19= 46+13= 56+24= 69+15= 49+
34、37= 32+34+26= 81-6= 60-21= 64-51= 92-38= 22+19= 96-70= 55+27= 25+23= 10+53+7= 53+17= 53+29= 90-46= 44+16= 16+13= 58+3+7= 29+38+24= 51+23+7= 38+36+19= 39+37+19= 39+26= 39-18= 56+29= 38+54+19= 48-15= 89+1+9= 56+33+7= 86+8+2= 2+80+10= 97-13= 39+16+19= 51-48= 8+26+34= 24+18= 45+30= 65-16= 68+15= 44+24=
35、68+17= 81-28= 97-39= 18 46+26= 40+15= 45+30= 70-6= 52+12= 14+27= 49-12= 94-56= 44+17= 80-46= 35+29= 90-65= 67+13= 81-22= 43+19= 24+29= 39+35+18= 53+8+12= 16+58+12= 25+26+4= 90-14= 96-13= 69+19= 37-29= 22-22= 66+13= 72+5+5= 12+9+41= 33-13= 63+19= 68-22= 80-66= 29+28+35= 28+16+19= 36+39+18= 39+18+22=
36、66+14= 43+28= 46+39= 72-46= 4+16+44= 58+3+7= 33+59+19= 34+60+10= 62+27+3= 69+20+10= 27+29= 44-18= 31+25+35= 29+16+36= 46+17+13= 39+27+3= 64+29= 29+65= 91-65= 67+26= 71-13= 24+19= 91-75= 16+27= 19 61-35= 59+21= 34+60+10= 57-2= 63-17= 42-27= 70-24= 92-27= 72-17= 57+18= 82-17= 74-65= 63-27= 90-36= 85-2
37、6= 25+28= 38+37+13= 45+15+15= 34+5+5= 13+16+54= 11+49= 46+26= 40+15= 96-70= 4+22+8= 34+29+18= 45+39= 95-66= 73+26+4= 45+16+29= 76-38= 46+36+18= 48+13+27= 12+17+13= 32+23+39= 28+62= 18+25= 16+72= 65+21+9= 90-14= 96-13= 44+16= 13+46+24= 15+63= 74-39= 80-46= 56+33+7= 36+29+16= 57+26= 50-29= 46+25+5= 99
38、-73= 68-55= 67-37= 57+28= 39+32= 48-4= 80-54= 80+8+2= 20 22+19= 4+16+44= 12+40= 27= 48-39= 33= 23+29= 39= 54+29= 14+53= 20+39= 11+24= 73+11= 56+19= 38+9= 29+6= 73-52= 33+27= 43+15= 36-25= 89+1+9= 13+47= 25= 11+69= 55+27= 20+77= 36= 41= 80-28= 11+29= 59= 63= 86+8+2= 77+8= 46+5= 57+11= 69+17= 17+26= 8
39、8+17= 7+48= 23= 11+32= 29= 56+29= 86+8+2= 35= 16+67= 4264= 29+36+24= 57= 61= 37+31= 36+22= 79+20= 37+9= 35-28= 59+30+10= 39+6= 77-13= 31= 3、认真做好培优补差工作。 开展一帮一活动，与后进生家长经常联系，及时反映学校里的学习情况，促使其提高成绩，帮助他们树立学习的信心与决心。21 定理: 不在同一直线上的三个点确定一个圆. （尺规作图）27= 13+47= 25= 17+71= 11+19= 44= 13+50= 56= 35+1= 99= 95= 68=
40、70-52= 63+3= 77-6= 11+23= 12+35= 23+29= 39= 37= 11+69= 23= 11+32= 11+31= 51= 23+26= 15+61= 17+73= 11+12= 6+91= 14+56= 73= 54+4= 39-6= 77-22= 21= 20+77= 36= 41= 44= 12+40= 17+19-18= 21+93= 29= 13+45= 46= 71+4+5= 63+3= 35+3= 97= 1+12+7= 13+44= 4+99= 28-5= 60-9-5= 11+2= 35= 16+67= 4245= 23+26= 推论2 经过切点
41、且垂直于切线的直线必经过圆心.22 67= 22+48= 11+26= 13+48= 39-6= 77-22= 4+99= 17+26= 24= 11+9= 45= 23+27= 11+3= 84= 56= 17+74= 46= 11+19= 53= 57= 22+96= 72= 75= 81= 28-5= 70-52= 30+57= 39+6= 13+46= 28= 23+25= 9+81= 11+1= 11+27= 11+30= 17+75= 13+50= 51= 54= 20+39= 135.215.27加与减（三）4 P75-8018+77= 21+35= 11+10= 69= 77-
42、6= 54+4= 65-23= 43+15= 26= 11+11= 37= 18+82= 11+25= 11+28= 17+73= 18+76= 15+61= 13+45= 11+29= 59= 23 83= 15+63= 65= 64 = 88+17= 7+48= 92+4= 84-15= 11+18= 71= 21= 42+19= 34= 19+80= 89= 34-29 = 61= 64= 34+36= 35+34= 16+68= 87= 77 = 86 = 77-13= 35-28= 78+14= 27+48= 32= 62= 25+66= 26+16= 18+78= 11+16= 8
43、7-75 = 15-25 = 11+24= 38= 81-56= 62+36= 15+62= 65 = 57 = 85= 36-25= 23+28= 42+38= 42-28= 11+20= 11+23= 49+25= 27+26= 19+79= 11+17= 45-18 = 64-34 = 63= 14+54= 69+6= 81-69= 24 6 确定圆的条件:89 = 74 = 26 = 34 = 42+49= 96-28= 80-25= 88-65= 36+38= 55+16= 48+43= 55+39= 89-28 = 80-28 = 56-48 = 61-86 = 74-26= 36
44、+49= 68+25= 57+29= 74 = 27 = 38 = 28 = 23+38= 36+44= 45-29= 54+25= 69+27= 46+36= 79+12= 68-25= 78-96 = 73-48 = 66-67 = 36-33 = 54+36= 23+48= 58+28= 33+2+38= 77 = 52 = 96 = 63 = 28+45= 34+49= 18+65= 76-65= 64+28= 29+44= 52-49= 40+29+1= 98-64 = 78-38 = 44-14 = 63-65 = 67+24= 47-28= 37+58= 49+39= 3、观察身
45、边的简单物体，初步体会从不同角度观察物体所看到的形状可能是不同的，学生将经历从立体图形到平面图形的过程,认识长方形、正方形、三角形、圆等平面图形，初步体会面在体上，进一步发展空间观念。25 （3）当0时，设抛物线与x轴的两个交点为A、B，则这两个点之间的距离：64 = 63-3= 62+15= 76-73 = 71+16= 28 = 62+5+15= 54-13= 64-56 = 77+21+9= 48 = 一锐角三角函数51+15= 84.164.22有趣的图形1 整理复习284+3+7= 66-74 = 本册教材在第五单元之后安排了一个大的实践活动，即“分扣子”和“填数游戏”。旨在综合运用所学的知识，从根据事物的非本质的、表面的特征把事物进行分类，发展到根据客观事物抽象、本质的特征进行不同方式的分类，促进孩子逻辑思维能力的发展。同时，安排学生填数游戏，旨在对孩子的口算能力、逻辑思维能力和观察能力的训练，感受数学的乐趣!26