47.2+8.6-7.2怎样用简便运算

47.2+8.6-7.2怎样用简便运算

47.2+8.6-7.2怎样用简便运算
47.2+8.6-7.2
=47.2-7.2+8.6
=40+8.6
=48.6

92*0.9 7.2怎样用简便运算做

=92×0.9+9.2-2

=9.2×9+9.2-2

=9.2×（9+1）-2

=9.2×10-2

=92-2

=90

17.2-7.2x0.2怎样用简便运算

17.2-7.2x0.2
10+7.2-7.2x0.2
=10+7.2x0.8
=10+5.76
=15.76

用简算8.38+9.43+6.62。5.86-1.77+2.54。47.2+8.6-7.2

8.38+9.43+6.62。
=8.38+6.62+9.43
=15+9.43
=24.43
5.86-1.77+2.54。
=5.86+2.54-1.77
=8-1.77
=6.23
47.2+8.6-7.2
=47.2-7.2+8.6
=40+8.6
=48.6

12.8*8.6+7.2*86简便运算怎么做

解答：=12.8*8.6+72*8.6
=8.6*（12.8+72）
=8.6*84.8
=729.28

3.61.25怎样用简便运算算

3.6*1.25
=0.9*4*1.25
=0.9*5
=4.5

简便运算 1.2*8.2 47.2*0.18

简便运算 1.2*8.2 47.2*0.18
1.2*8.2 47.2*0.18
=9.84+8.496
=18.336

438加199怎样用简便运算

438+199
=438+200-1
=637
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