《80道脱式计算问题详解过程.docx》由会员分享，可在线阅读，更多相关《80道脱式计算问题详解过程.docx（8页珍藏版）》请在三一文库上搜索。
1、1.25X (8+10)=1.25X8+1.25X10=10+12. 5=22.59123- (123+8.8)二9123-123-8.8二9000-8 8=8991.21.24X8.3+8.3X1.76二8.3X (1.24+1.76)=8.3X3=24.99999X1001二9999X (1000+1)二9999 X1000+9999X1=1000899914. 8X6. 3-6. 3X6. 5+8. 3X3. 7 =(14. 8-6.5) X6. 3+8. 3X3. 7=8.3X6. 3+8. 3X3. 78. 3X (6.34-3.7)=8.3X10=831.24+0. 78+8. 7
2、6=(1.24+8.76) +0.78 =10+0.78=10. 78933-157-43=933- (157+43) =933-200=7334821-998=4821-1000+2=3823132X125X25=4X8X125X25=(4X25) X (8X125)=100X1000=10000090484-268=(2600+2600+2600+1248) 一26=2600一 26+26004-26+2600三 26+1248三 269=100+100+100+48二 3482881 4- 43=(1290+1591)三 434=12904-43+15914-43=30+373.2X42
3、.3X3. 75-12.5X0. 423X16 =3.2X42. 3X3. 75-1. 25X42. 3X1.6=42. 3X (3.2X3. 75-1.25X1.6)=42. 3X (4X0. 8X3. 75-1.25X4X0.4)=42. 3X (4X0. 4X2X3. 75-1. 25X4X0. 4)=42. 3X (4x0. 4x7. 5-1.25x4x0. 4)=42. 3X 4X0. 4X(7. 5-1.25)=42. 3X 4X0. 4X6. 25=42. 3 X (4X2. 5)=42371.8+184-1.5-0.5X0.3=1.8+12-0.15=13. 8-0. 15=1
4、3. 656.5X8+3.5X8-47=52+28-47=80-47(80-9. 8) X5 分之 2-1.32=70. 2X2/5-1.32=28. 08-1.32=26. 768X7 分之 44-14-(3. 2-2. 95)=8X4/7-? 14-0. 25=8X4/74-4=8/7 2700X (506-499) 4-900=2700X74-900=18900-900=2133. 02- (148.4-90. 85) 4-2.5=33. 02-57. 554-2.5=33. 02-23. 02=10(1-?1-1)三 5.1=(1-1) 一 5 1=04-5. 1=018. 1+ (3
5、-0. 2994-0. 23) X1=18. 1+1.7X1=18. 1+1.7=19.8T8+29+-52+60=19卜3 +-2 +卜1+0+1+2=-3-3011+125+301+-75=50-1+-1/2+3/4+-1/4=-1-7/2+5/6+-0. 5+4/5+19/6=1.25-26. 54 + -6 14J+18. 54+6.14=-81.125+ -17/5 + -1 /8 + -0. 6=-30. 45X2.5 = 1. 1250.8X1.25 = 10.3X3.6=1.080.3X0. 3=0. 0910X0. 07= 0.70. 92X0.4= 0. 3680.2X0.
6、 26=0. 0520. 14X4=0. 560. 02X0. 1=0. 0021.2X0. 3= 0. 362.5X0. 4=12.4X5 = 120. 22X4= 0. 883. 25X0=00.9-0. 52= 0. 383. 99X1=3.990X3.52=012.5X8 = 10084-10 = 0.810-1.8-7.2= 10. 43+3. 57= 40.9X0. 8= 0. 722.5X4X12=1447. 5x-3x =4. 5xa+3a+7a= 11a1.05X100= 10514-0.5= 20. 964-3= 0. 320. 56X100= 563. 78X100= 3
7、784-0.8 =53. 215X100= 321.50.8X10=84.08X100=4081.1X0.2 =0. 220. 6X0.8 =0.483X0.9= 2.72.5X0.4=10. 16X5 = 0.81.78+2.2 = 3.981.2X0. 5-0. 4 = 0.20.74-0.01 = 702.5X0.4 = 112-3. 9=8. 16.64-0. 66 = 105. 37X0+4. 63 =4. 633.9+2.03= 5. 937.2 + 2.8 = 101.4X5= 73/5+ (-2/3)=9/15+(-10/15)=-(10/15 -9/15)=-1/151/2+
8、(-2/3) +4/5+(-1/2) + (-1/3)= 1/2+ (-1 /2) + (-2/3) + (-1/3) +4/5二 0+(-1 )+4/5=-1/513/17-3. 5-6+2.5+6+4/17=(13/17+4/17 + (-3. 5)+2. 5 + -6+6=1 + (-1 )+0=0(-3. 8) +2. 7+ (-0. 43) +1 3+ (-0. 2)=(一3 8) + (-0. 2) + 2. 7+1 3 + (-0. 43)=(-4) +4+ (-0. 43)二-0 435/6+ (-3/4)=10/12+(-9/12)=10/12-9/12=1/12(-57/8
9、) +2. 125 + (-3. 37) + (-2. 63) + 25/4+ (-0. 25)= (-7. 125)+2. 125-6+ 6. 25-0. 25=(-5) + (-6) +6二-5(-32)7+5)=(-32) + (-5)二-377. 3- (-6. 8)=7. 3+(+6. 8)=14. 1(-1/50- (-2/3) - (+0. 48) - (+4/9)=(-1 /50) + (+2/3) + (-0. 48) + (-4/9)=-1/50+2/3-0.48-4/9=-1/50-0. 48+2/3-4/9= (-0.02-0. 48) + (6/9-4/9)=-5/1
10、8(-2)-(-25)=(-2) + (+25)=231/2* H/4)=-(1/2*1/4)=-1/8(-1/2) * (-3/4)二+ (1/2*3/4)=3/8(-3) *5/6* (-3/5) * (-9/4)=-3*5/6*3*5*9/4=-27/8(-0. 25) *0.5* (-100) *4= (-4*0. 25) *0.5* (-100)=-1*(-50)=50(-5) *10/3+2*10/3+ (-6) *10/3= (-5+2-6) *10/3=-9* (3+1/3)二-27-3二-30-13*2/3-0. 34*2/7+1/3* (-13)-5/7*0.34=-13*
11、2/3+173*(-13) + (-0 34*2/7-5/7*0. 34)=-13* (2/3+1 /3) +0. 34* (-2/7-5/7)=-13-0.34=-13. 34(-3)三(-7/4) *0. 75*7/34-3=-3* (-4/7) *3/4*7/3*1/3=3*4/7*3/4*7/3*1/3=1-3-【-5+ (1-0. 2*3/5) -r (_2)】 =-3-5+(1-3/25) 4- (-2) =-3-5+22/25* (-1/2)=-3-(-5-11/25)=-3+5 又 11/25=2 5111/25154- (1/5-1/3)=154- (-2/15)=-15*15/2=-225/2(-5/6)三(-2/3) * (-3/2)=(-5/6) * (-3/2) * (-3/2)=-5/6*3/2*3/2=-15/8