0.939.9简便计算怎么写

1.0.125*72简便计算 3.2*2.5简便计算 0.93*99简便计算 70.1*9.9简便计解
0.125*72
=0.125*8*9
=1*9
=9
3.2*2.5
=8*0.4*2.5
=8*1
=8
0.93*99
=0.93*(100-1)
=0.93*100-0.93*1
=93-0.93
=92.07
70.1*9.9
=70.1*(10-0.1)
=70.1*10-70.1*0.1
=701-7.01
=693.99
0.93+9.9
=(1-0.1)+0.93
=(1+0.93)-0.1
=1.93-0.1
=1.83
6.4*(0.125+12.5)
=6.4*0.125+6.4*12.5
=0.8*8*0.125+8*0.8*12.5
=0.8*1+8*1
=8+0.8
=8.8
2.1.01*1011.01*101-1.11
= 1.01 x (100 + 1) - 1.11
= 1.01 x 100 + 1.01 x 1 - 1.11
= 101 + 1.01 - 1.11
= 100 + 1 + 1.01 - 1.11
= 100 + 1.11 - 1.11
= 100
15.8*9.9
= 15.8 x (10 - 0.1)
= 15.8 x 10 - 15.8 x 0.1
= 158 - 1.58
= 156.42
【0.939.9简便计算怎么写】

0.939.9简便计算怎么写

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