题目内容

【题目】脱式计算(能简便的要用简便方法计算)

(1)36+64×85+15

(2)0.4×9×25

(3)61×40%+38× +0.4

(4)2475÷45+2475÷55

(5)(15﹣14× )×

(6)+5.8﹣ +4.2.

【答案】(1)解:36+64×85+15 =36+5440+15

=5476+15

=5491;

(2)解:0.4×9×25 =0.4×25×9

=10×9

=90;

(3)解:61×40%+38× +0.4 =61×0.4+38×0.4+0.4

=(61+38+1)×0.4

=100×0.4

=40;

(4)解:2475÷45+2475÷55 =55+45

=100;

(5)解:(15﹣14× )× =(15﹣8)×

=7×

=

(6)解: +5.8﹣ +4.2 =( )+(5.8+4.2)

=1+10

=11.

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