题目内容

【题目】用递等式计算,能简便方法计算的要用简便方法计算。

700.42)÷7        46.9×3.746.9×5.346.9

0.2÷2.5×4.21.075)    3.23.2×30.429.85)]÷1.8

7.74×2.81.3)+1.5×2.26     (20.8×43.68÷0.01

【答案】10.06;469

0.25;0.8

1538.4

【解析】

700.42)÷7       

=70.42÷7

=10.06

46.9×3.746.9×5.346.9

=46.9×(3.75.31

=46.9×10

=469

0.2÷2.5×(4.21.075)   

=0.08×3.125

=0.25

3.23.2×(30.429.85)]÷1.8

= [3.23.2×0.55]÷1.8

= [3.21.76]÷1.8

= 1.44÷1.8

= 0.8

7.74×(2.81.3)+1.5×2.26     

=7.74×1.51.5×2.26

=1.5×(7.742.26

=1.5×10

=15

20.8)×(43.68)÷0.01

= 1.2×0.32÷0.01

= 0.384÷0.01

= 38.4

练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网