1.一年级加减脱式计算怎么写脱式计算即递等式计算，把计算过程完整写出来的运算，也就是脱离横式的计算 。在计算混合运算时，通常是一步计算一个算式（逐步计算，等号不能写在原式上），要写出每一步的过程 。一般来说，等号要往前，不与第一行对齐 。
比如：8-3+2=5+2=72+4-3=6-3=3
在乘除法连续计算时中，要按从左往右的顺序依次计算 。
扩展资料
1、一般情况下，四则运算的计算顺序是：有括号时，先算括号里面的；只有同一级运算时，从左往右；含有两级运算，先算乘除后算加减 。
2、由于有的计算题具有它自身的特征，这时运用运算定律，可以使计算过程简单，同时又不容易出错 。
加法交换律：a+b=b+a
乘法交换律：a*b=b*a
加法结合律：（a+b）+c=a+(b+c)
乘法结合律：（a*b）*c=a*(b*c)
2.急需100道脱式简便计算题带答案和过程1. 0.4*125*25*0.8 =(0.4*25)*(125*0.8)=10*100=1000 2. 1.25*(8+10)=1.25*8+1.25*10 =10+12.5=22.5 3.9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2 4.1.24*8.3+8.3*1.76 =8.3*(1.24+1.76) =8.3*3=24.9 5.9999*1001=9999*(1000+1)=9999*1000+9999*1=10008999 6. 14.8*6.3-6.3*6.5+8.3*3.7=(14.8-6.5)*6.3+8.3*3.7=8.3*6.3+8.3*3.7=8.3*(6.3+3.7)=8.3*10=83 7. 1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78 8. 933-157-43 =933-(157+43) =933-200 =733 9. 4821-998=4821-1000+22=3823 10. 32*125*25=4*8*125*25=(4*25)*(8*125)=100*1000=100000 9048÷26=(2600+2600+2600+1248)÷26=2600÷26+2600÷26+2600÷26+1248÷26=100+100+100+48=34811. 2881÷ 43=(1290+1591)÷ 43=1290÷43+1591÷43=30+37 =67 3.2*42.3*3.75-12.5*0.423*16=3.2*42.3*3.75-1.25*42.3*1.6=42.3*(3.2*3.75-1.25*1.6)=42.3*(4*0.8*3.75-1.25*4*0.4)=42.3*(4*0.4*2*3.75-1.25*4*0.4)=42.3*(4x0.4x7.5-1.25x4x0.4)=42.3*[4*0.4*(7.5-1.25)]=42.3*[4*0.4*6.25]=42.3*(4*2.5) =42312. 1.8+18÷1.5-0.5*0.3 =1.8+12-0.15=13.8-0.15 =13.65 13. 6.5*8+3.5*8-47 =52+28-47 =80-47 =33 (80-9.8)*5分之2-1.32 =70.2X2/5-1.32=28.08-1.32 =26.76 14. 8*7分之4÷[1÷（3.2-2.95）] =8*4/7÷[1÷0.25]=8*4/7÷4 =8/7 15. 2700*(506-499)÷900 =2700*7÷900 =18900÷900 =21 16. 33.02-(148.4-90.85)÷2.5=33.02-57.55÷2.3=33.02-23.02=10 17. (1÷1-1)÷5.1 =(1-1)÷5.1 =0÷5.1 =0 18. 18.1+(3-0.299÷0.23)*1=18.1+1.7*1 =18.1+1.7 =19.819. 9000÷72*(1.25*0.7*8)=9000÷72*7=125*7=87520. 61-(1.25+2.5*0.7)=61-3=5821. [(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=13.0522. 5.4÷1.8+240*1.5=3+360=36323. 9000÷72*(1.25*0.7*8)=9000÷72*7=125*7=87524. 61-(1.25+2.5*0.7)=61-3=5825. [(10-0.8)+9.85]-2÷0.125=19.05-2÷0.125=19.05-16=3.0526. 408-12*24= 408 - 288= 12027. (46+28)*60= 74 x 60= 444028. 42*50-17 = 2100- 17 = 208329. 32+105÷5 = 32 + 21= 5330. 420*(327-238) = 420 x 89 = 3738031. (4121+2389)÷7 = 6510 ÷7 = 93032. 3.416÷（0.016*35） = 3.416 ÷0.56 = 6.133. 0.8*[(10-6.76)÷1.2] = 0.8 x(3.24÷1.2) = 0.8 x 2.7 = 2.1634. 5.67*0.2-0.62 = 1.134-0.62 = 0.51435.0.4*0.7*0.25 = 0.4 x 0.2 5 x 0.7 = 0.1 x 0.7 = 0.0736. 0.78+5.436+1 = 6.216 +1 = 7.21637. 30.8÷[14-(9.85+1.07)] = 30.8 ÷ （14 - 10.92） = 30.8÷3.08 = 1038. [60-(9.5+28.9)]÷0.18 = (60- 38.4)÷0.18 = 21.6 ÷0.18 = 12039. 2.881÷0.43-0.24*3.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.8640. 20*[(2.44-1.8)÷0.4+0.15] = 20x (0.64 ÷0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 3541. 28-(3.4+1.25*2.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.642. 2.55*7.1+2.45*7.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.543. 0.8*〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.244.(31.8+3.2*4)÷5 = (31.8 + 12.8)÷5 = 44.6÷5 = 8.9245. 31.5*4÷（6+3） = 126 ÷ 9 = 1446. 2÷2.5+2.5÷2 = 0.8 + 1.25 =2.0547. 194-64.8÷1.8*0.9 = 194 -36 x0.9 = 194-32.4 = 161.65180-705*6 = 5180 - 4230=95048. 24÷2.4-2.5*0.8 =10 -2=849. 405*(3213-3189) =405x24 = 972059. 125*(97-81) =125x16 =200060. 6942+480÷3 = 6942 + 160 = 678261. 20+80÷4-20 = 20 + 20 -20 = 40 -20 = 2062. 100÷（32-30）*0 = 100 ÷2 x0= 50 x0 = 063. 25*4-12*5 = 100 - 60 = 4064. 70*〔（42-42）÷18〕=70 x (0÷18) = 70x0 = 065. 75*65+75*35 = 75 x (65 +35) = 75x100 = 7500 66. 6-1.6÷4= 6- 0.4 = 5.667. 5.38+7.85-5.37= 13.23 - 5.37=7.8668. 7.2÷0.8-1.2*5=9 - 6 =369. 6-1.19*3-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 270. 6.5*(4.8-1.2*4)= 6.5 x(4.8 - 4.8 )=6.5 x0 = 071. 0.68*1.9+0.32*1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.972. 10.15-10.75*0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.1573. 5.8*(3.87-0.13)+4.2*3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.474. 32.52-(6+9.728÷3.2)*2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.9775.(136+64)*(65-345÷23)= 200x(65-15) = 200x 50=1000076. 0.4*125*25*0.8 =(0.4*25)*(125*0.8)=10*100=1000 77. 1.25*(8+10) =1.25*8+1.25*10=10+12.5=22.5 78. 9123-(123+8.8) =9123-123-8.8=9000-8.8=8991.2 79. 1.24*8.3+8.3*1.76 =8.3*(1.24+1.76)=8.3*3=24.9 80. 9999*1001 =9999*(1000+1)=9999*1000+9999*1 =10008999 81. 14.8*6.3-6.3*6.5+8.3*3.7 =(14.8-6.5)*6.3+8.3*3.7=8.3*6.3+8.3*3.7 82. 8.3*(6.3+3.7) =8.3*10 =83 83. 1.24+0.78+8.76 =(1.24+8.76)+0.78 =10+0.78 =10.78 84. 933-157-43 =933-(157+43)=933-200=73385. 4821-998 =4821-1000+2=3823 86. I32*125*25 =4*8*125*25 =(4*25)*(8*125)=100*1000 =10000087. 9048÷268=(2600+2600+2600+1248)÷26=2600÷26+2600÷26+2600÷26+1248÷269=100+100+100+48=34888. 2881÷ 43 =(1290+1591)÷ 434=1290÷43+1591÷43=30+3789. 1.8+18÷1.5-0.5*0.3 =1.8+12-0.15=13.8-0.15=13.6590. 6.5*8+3.5*8-47 =52+28-47= 。