如题所述
第1个回答 2011-09-15
6.93*99+6.93=6.93*（99+1）=6.93*100=693
12.5*3.4*0.8=（12.5*0.8）*3.4=10*3.4=34
4.36*99+4.36=4.36*（99+1）=4.36*100=436
8.7*9.9=8.7*(10-0.1)=8.7*10-8.7*0.1=87-0.87=86.13
2.5*32*0.125=(2.5*4)*(8*0.125)=10*1=10
12.5*3.4*0.8=（12.5*0.8）*3.4=10*3.4=34
4.36*99+4.36=4.36*（99+1）=4.36*100=436
8.7*9.9=8.7*(10-0.1)=8.7*10-8.7*0.1=87-0.87=86.13
2.5*32*0.125=(2.5*4)*(8*0.125)=10*1=10
第2个回答 2011-09-15
6.93*99+6.93
=6.93*(99+1)
=6.93*100
=693
12.5*3.4*0.8
=12.5*0.8*3.4
=10*3.4
=34
4.36*99+4.36
=4.36*(99+1)
=4.36*100
=436
8.7*9.9
=8.7*（10-0.1）
=87-0.87
=86.13
2.5*32*0.125
=2.5*4*8*0.125
=10*1
=10本回答被提问者采纳
=6.93*(99+1)
=6.93*100
=693
12.5*3.4*0.8
=12.5*0.8*3.4
=10*3.4
=34
4.36*99+4.36
=4.36*(99+1)
=4.36*100
=436
8.7*9.9
=8.7*（10-0.1）
=87-0.87
=86.13
2.5*32*0.125
=2.5*4*8*0.125
=10*1
=10本回答被提问者采纳
第3个回答 2011-09-15
6.93*99+6.93
=6.93*（99+1）=6.93*100=693
12.5*3.4*0.8=12.5*0.8*3.4=100*3.4=340
4.36*99+4.36=4.36*（99+1）=4.36*100=436
8.7*9.9=8.7*10-8.7*0.1=87-0.87=86.13
2.5*32*0.125 =2.5*（30+2）*0.125=（75+5）*0.125=80*0.125=10
=6.93*（99+1）=6.93*100=693
12.5*3.4*0.8=12.5*0.8*3.4=100*3.4=340
4.36*99+4.36=4.36*（99+1）=4.36*100=436
8.7*9.9=8.7*10-8.7*0.1=87-0.87=86.13
2.5*32*0.125 =2.5*（30+2）*0.125=（75+5）*0.125=80*0.125=10
第4个回答 2011-09-15
6.93*99+6.93
=6.93×（99+1）
=6.93×100
=693
12.5*3.4*0.8
=10×3.4
=34
4.36*99+4.36
=4.36×（99+1）
=4.36×100
=436
8.7*9.9
=8.7×（10-0.1）
=8.7×10-8.7×0.1
=87-0.87
=86.13
2.5*32*0.125
=2.5×4×8×0.125
=10×1
=10
=6.93×（99+1）
=6.93×100
=693
12.5*3.4*0.8
=10×3.4
=34
4.36*99+4.36
=4.36×（99+1）
=4.36×100
=436
8.7*9.9
=8.7×（10-0.1）
=8.7×10-8.7×0.1
=87-0.87
=86.13
2.5*32*0.125
=2.5×4×8×0.125
=10×1
=10
