Question

1除以[(1.1—0.7)乘以0.2]简便运算

Answer 1

1除以[(1.1—0.7)乘以0.2]简便运算

1除以[(1.1—0.7)乘以0.2]简便运算
1除以[(1.1—0.7)乘以0.2]
=1÷（0.4*0.2）
=1÷0.08
=12.5

7.81减去7.7除以0.7再乘以5.2的简便运算

7.81-7.7÷0.7×5.2
=7.81-11×5.2
=7.81-57.2
=-49.39

2.1乘0.3加21除以0.7简便运算

2.1×0.3+21÷0.7
=7+30
=37

0.6667乘以0.7加0.1111乘以2.1简便运算

0.6667×0.7+0.1111×2.1
=0.6667×0.7+0.3333×0.7
=（0.6667+0.3333）×0.7
=1×0.7
=0.7

36除以12乘以(121 212)简便运算

36÷12×（121+ 212)
=36÷12×333
=3×333
=999

48除以0.16乘以0.37的简便运算

48除以0.16乘以0.37的简便运算
48除以0.16乘以0.37
=48÷0.16*0.37
=300*0.37
=111

7250除以5乘以2的简便运算

7250除以5乘以2的简便运算
=7250÷(5×2）
=7250÷10
=725

4.5乘以0.7加0.55乘以7的简便运算

4.5x0.7+0.55x7
=0.7x（4.5+0.55x10）
=0.7x（4.5+5.5）
=0.7x10
=7
答题不易，望采纳~~~

0.78除以0.3再除以0.2简便运算

0.78除以0.3再除以0.2
=0.78÷（0.3x0.2）
=0.78÷0.06
=13

180除以15+12乘以60的简便运算

180/15+12*60
=3*60/15+12*60
=3*4+720
=12+720
=732