Question

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6道递等式计算（能简则简）
12.5*0.7*0.32*25 3.71+3.71*17.4-8.4*3.71 8.8*25-8.8*12.5
8.4÷0.6+8.4÷0.4 16.8*10.01 【20-（8.25÷0.6+2.25）】*1.6

Answer 1

12.5*0.7*0.32*25 3.71+3.71*17.4-8.4*3.71 8.8*25-8.8*12.5
=（12.5*0.8）*（0.4*0.25）*0.7 =3.71*1+3.71*17.4-8.4 =8.8*（25-12.5）
=10*0.1*0.7 =3.71*（1+17.4-8.4） =8*1.1*12.5
=0.7 =3.71*10 =100*1.1
=37.1 =110
8.4÷0.6+8.4÷0.4 16.8*10.01 【20-（8.25÷0.6+2.25）】*1.6
=14+21 =16.8*10+16.8*0.01 =[20-（13.75+2.25）]*1.6
=35 =168+0.168 =【20-16】*1.6
=168.168 =6.4
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Answer 2

12.5*0.7*0.32*25=(12.5*0.8)*(0.4*25)*0.7=10*10*0.7=70
3.71+3.71*17.4-8.4*3.71=3.71*(1+17.4-8.4)=3.71*10=37.1
8.8*25-8.8*12.5=8.8*(25-12.5)=8.8*12.5=(8+0.8)*12.5=8*12.5+0.8*12.5=100+10=110
8.4÷0.6+8.4÷0.4=14+21=35
16.8*10.01=16.8*(10+0.01)=16.8*10+16.8*0.01=168+0.168=168.168
【20-（8.25÷0.6+2.25）】*1.6=[20-(13.75+2.25)]*1.6=4*1.6=6.4

Answer 3

(1) 12.5*0.7*0.32*25
= 8.75*8
= 70

(2) 3.71+3.71*17.4-8.4*3.71

=3.71+64.554-31.164
=37.1

(3) 8.8*25-8.8*12.5

=220-110
=110

(4) 8.4÷0.6+8.4÷0.4

=14+21
=35

(5)16.8*10.01

=168.168

(6) 【20-（8.25÷0.6+2.25）】*1.6

=【20-（13.75+2.25）】*1.6
=【20-16】*1.6
= 4*1.6
=6.4

Answer 4

(1) 12.5*0.7*0.32*25＝12.5乘0.7乘0.32乘12.5乘2＝12.5²乘1.4乘0.32

Answer 5

为什么说圆柱的两个底面是完全相同的