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1、四年级数学整数简便运算120道(1)67 + 42 + 33 + 58(10)163x8 + 37x8(2)258-58-26-74(11)202 x 13(3)125x16(12)77x4x5(4) 50x (2x4) X25(13) 27x99(5) 7x8x3x 125(14)48 x 250(6) 26x103(15)98 + 303(7) 501x12(16)49 + 49x49(8) 25 x (40+8)(17)55x25 + 25x45(9) 39x 14 + 61X 14(18)123x67-23x67(29) 480 + 15(19)39x101-39(30) 21x99(
2、20)99x64 + 64(21)76x23 + 24x23(31) 125x32(32) 12x301(22)12 + 19x12(23)21 +254 + 79 + 46(33) 75x3x4(24) 25x 16x5(25) 52x32 + 48x 32(35) 256x9-46x9(26) 18x 137-18x37(36) 13 + 13x49(34) 19 + 99x 19(27) 450 + 18(37) (25+125) x8(28) 420 + 35(38) 541 x67-67x441(39) 43x201(49) 68x48 + 68x2(40) 102x35(50) 5
3、x27 + 63x5(41) 304 x 22(51) 12x (40-5)(42) (30+4) x25(52) 64x9-14x9(53) 35x98(43) 38x7 + 62x7(44) 152x8 + 148x8(54) 23x 134-34x23(45) 16x401(55) 102x45(46) 103x23(56) 648 + 203(47) (30 + 2) X 15(57) 98x32(48) 125x (8+16)(58) 44x25(69) 36x25(70) 304 + 297(59) 63 + 15x2(60) 43 + 43x39(87)(61) 27x37 +
4、37x23(71) 18x45 + 18x55(62) 256x7-56x7(72) 226x 13-26x 13(63) 48x 101-48(73) 15x301-15(64) 99x62 + 62(74) (30+8) x25(65) 41x99(75) 25x65 + 25x25(66) 765 + 98(76) 75x 141-75x40(67) 560 + 16(77) 125x18(68) 201 x34(78) 25x35 + 2571X23-71X 13(89)25x5x 16125 x (80-8)(90)56 + 56x49101x89-89(91)57x26 + 26x
5、4388 x 22 +22 x 12(92)373x9-73x928x57 + 43x28(93)78x101-78202x41(94)199x53 + 5325 x 19x4(95)25x 124-24x2547 + 99 + 47(96)250 x 28103x37(97)125 x 16(79)(80)(81)(82)(83)(84)(85)(86)(88) 34x201(98) 250x9x4(99) 48x 125(109) 101 x85-85(100) 24x250(110) 25x 19(101) 402x15(111) 152 x 49 +51 x 152(102) 25+2
6、50) x4(112) 50x (60 + 8)(103) 199x9 + 199(113) 93x99 + 93(104) 27x 18 + 82x27(114) 13 x 125x8(105) 2 x 46+ 46 x 18(115) 125 x 17 + 63 x 125(106) 401x25(116) 492-145-155(107) 72x 101(117) 43x25x2(108) 42x (30-1)(118) 24x25(119) 28x 111-28x 11(120) 63x8 + 91x63 + 63=25 x 40+25 x 8=1000+200=1200(9) 39x
7、14 + 61x14 =(39+61) X14 =100x 14=1400(10) 163x8 + 37x8=(163+37) X8=200x8=1600(11) 202 x 13=(200+2) X 13=200 x 13+2 x 13=2600十26=2626(12) 77x4x5=77 x (4x5)=77x20=1540(13) 27x99=27X (100-1)=27 x 100-27 x 1=2673(14) 48 x 250 =12x4x250 =12 x (4x250)=12x 1000=12000(15) 98 + 303=98+3+300=102+300二 402(16)
8、49 + 49x49=49x (1+49)参考答案(1) 67 + 42 + 33 + 58二(67+33) + (42+58)=100+100=200(2) 258-58-26-74二258-58 - (26+74)=200-100=100(3) 125x16=125x8x2=1000x2=2000(4) 50x (2x4) X25二(50x2) x (4x25)=100x 100=10000(5) 7x8x3x 125=(7x3) x (8x125)=21x1000=21000(6) 26x103=26X (100+3)=26 x 100+26 x 3=2600+78=2678(7) 50
9、1x12=(500+1) X 12=500 x 12+1 x 12=6000+12=6012=3200(26) 18x 137-18x37=18x (137-37)=18x 100=1800(27) 450 4-18=450+ (3x6)=450 + 3 + 6=150 + 6=25(28) 420 + 35=420+ (7x5)=420 + 7 + 5=60-5=12(29) 480 4-15=480 + 3 + 5=160 + 5=32(30) 21x99=21x (100-1)=21 x 100-21 x 1=2100-21=2079(31) 125x32=125x8x4=1000x4=
10、4000(32) 12x301=12x (300+1)=12x300+12x1=3600+12=3612(33) 75x3x4=75 x 4 x 3=2450(17) 55x25 + 25x45=25x (55+45)=25x100=2500(18) 123x67-23x67=(123-23) x67=100x 67=6700(19) 39x101-39=39 x (101-1)=39x 100=3900(20) 99x64 + 64=(99+1) x64=100x64=6400(21) 76x23 + 24x23=(76+24) x23=100x23=2300(22) 12 + 19 x 1
11、2=12 x (1+19)=12x20=240(23) 21 +254 + 79 + 46=(21 +79) + (254+46)=100+300=400(24) 25x 16x5=25 x4x4x5=(25x4) x (4x5)=100x20=2000(25) 52x32 + 48x32=(52 + 48) x32=100x32=750+100二850(43) 38x7 + 62x7=(38+62) x7=100x7=700(44) 152x8 + 148x8= (152+148) x8=300x8=2400(45) 16x401=16x (400+1)=16 x 400+16 x 1二64
12、00+16二6416(46) 103x23= (100+3) x23=100x23+3x23=2300 + 69=2369(47) (30 + 2) X 15 =30x15+2x15 =450 + 30=480(48) 125 x (8+16)=125x8+125x 16=1000+2000=3000(49) 68x48 + 68x2 二68 x (48+2)二68 x 50 =3400(50) 5x27 + 63x5 =5x (27 + 63) =5x 100=500(51) 12 x (40-5)二300 x 3=900(34) 19 + 99x 19=19x (99+1)=1900(35
13、) 256x9-46x9= (256-46) x9=210x9=1890(36) 13 + 13x49=13x (1+49)=13x50=650(37) (25+125) x8=25 X 8+125 x 8=200+1000=1200(38) 541 x67-67x441= (541-441) x67=100x67=6700(39) 43x201=43 x (200+1)=43 x 200+43 x 1二8600+43二8643(40) 102x35= (100+2) x35=100x35+2x35=3500+70=3570(41) 304 x 22二(300+4) x22=300 x 22+
14、4 x 22=6600+88=6688(42) (30+4) x25=30 X 25+4 x 25=12x40-12x5二480-60=420(52) 64x9-14x9 二(64-14) X9 =50x9=450(53) 35x98=35 x (100-2)=35 x 100-35 x 2=3500-70=3430(54) 23x 134-34x23=23 X (134-34)=23X100=2300(55) 102x45= (100+2) x45 =100 x 45+2 x 45 =4500 + 90=4590(56) 648 + 203 =648+2+201 =650201=851(57
15、) 98x32= (100-2) X32 =100x32-2x32 =3200-64=3136(58) 44 X 25=11 x4x25 =11x100=1100(59) 63 + 15x2=63+30=93(60) 43 + 43x39=43 x 40=1720(61) 27x37 + 37x23 二(27 + 23) x 37 =50 x 37=1850(62) 256x7-56x7 二(256-56) X7 =200 x 7=1400(63) 48x 101-48=48 x (101-1)=48x 100二4800(64) 99x62 + 62= (99+1) X62=100x62=62
16、00(65) 41x99=41x (100-1) =41x100-41x1 =4100-41=4059(66) 765 + 98=765+100-2=863(67) 560 + 16=560 +(4x4)=560 4-4-4=43x (1+39)=140-4=35=75x101=7575(77) 125x 18=125x (10+8)=125 x 10+125x8=1250+1000=2250(78) 25x35 + 25=25X (35+1)=25 X 36=25 x 4 x 9二 900(79) 71 x23-71 x 13=71X (23-13)=710(80) 125 x (80-8)
17、=125x80-125x8=10000-1000二9000(81) 101x89-89= (101-1) X89=8900(82) 88x22 + 22x 12= (88+12) X22=2200(83) 28x57 + 43x28=28X (57+43)=2800(84) 202x41=(200+2) X41=200x41+2x41=8200+82=8282(68) 201x34= (200+1) x34=200 x 34+1 x 34=6800 + 34=6834(69) 36x25二9 x 4 x 25二9 x 100=900(70) 304+297=301+3+197=501(71)
18、18x45 + 18x55= (45+55) X 18=100x 18=1800(72) 226x 13-26x 13二(226-26) X 13=200x 13=2600(73) 15x301-15=15x (301-1)=15x300=4500(74) (30+8) X25=30 X 25+8 x 25二750+200二950(75) 25x65 + 25x25=25 X (65 + 25)=25x100=2500(76) 75x 141-75x40=75x (141-40)(85) 25x 19x4=25x4x 19=1900(86) 47x99 + 47=47 x (99 + 1)=4
19、7x 100=4700(87) 103x37= (100+3) x37=100x37+3x37=3700+111=3811(88) 34x201=34x (200+1)=34 X 200+34 x 1=6800+68二6868(89) 25x5x 16=25 x 4 x (4 x 5)=100x20=2000(90) 56 + 56x49=56x (49+1)=56 x 50=2830(91) 57x26 + 26x43 二(57+43) x26 =100x26=3600(92) 373x9-73x9 二(373-73) X9 =300 x 9=2700(93) 78x 101-78=78 X
20、 (101-1)=7800(94) 199x53 + 53= (199+1) x53=10600(95) 25x 124-24x25=25 x (124-24)=2500(96) 250x28=250x4 x 7=1000x7=7000(97) 125x 16=125x8x2=1000x2=2000(98) 250x9x4=250 x4x9=1000x9二9000(99) 48x 125=6x (8x 125)=6000(100) 24 x 250=6 x (4 x 250)二6000(101) 402x 15二(400+2) X 15=400x 15+2 x 15二6000+30二6030(
21、102) (25+250) x4=25 x 4+250 x 4=100+1000=1100(103) 199x9 + 199=199x (9+1)=1990(104) 27x 18 + 82x27=27 X (18 + 82)=2700(105) 2x46 + 46x 18=46x (18+2)=46 x 20二 920(106) 401x25= (400+1) x25=400 x 25+1 x 25=10000+25=10025(107) 72x 101=72X (100+1)=72 x 100+72 x 1=7200+72=7272(108) 42 X (30-1)=42 X 30-42
22、x 1二1260-42=1218(109) 101x85-85= (101-1) x85=8500(110) 25x19=25x (20-1)=25x20-25=500-25=475(111) 152x49 + 51 x 152=152 x (49 + 51)=152x100=15200(112) 50x (60 + 8)=50 X 60+50 X 8=3000+400=3400(113) 93x99 + 93=93x (99+1)二9300(114) 13x125x8=13 x (125x8)=13000(115) 125x 17 + 63x 125=125 x (17 + 63)=125x80=10000(116) 492- 145-155 =492-(145+155) =492-300=192(117) 43x25x2=43 x (25 X 2)=43 x 50=2150(118) 24x25=6 x (4 x 25)(119) 28x 111-28X 11=28 x (111-11)=2800(120) 63x8 + 91 x63 + 63=63x (8+91+1)=6300