Question

8.6×6.9-34.4简便运算？

Answer 1

简便计算方法如下

1、提取原式: 8.6×6.9-34.4

2、计算过程: 

=8.6×( 7-0.1 )-34.4

=8.6×7-8.6×0.1-34.4

=60.2-( 0.86+34.4 )

=60.2-35.26

=60.2-40+4.74

=20.2+4.74

=24.94

3、计算结果: 24.94

4、谢谢，期待您的采纳！

Answer 2

根据题意，这道题的简便运算方法是：原式等于8.6×6.9—8.6×4=8.6×（6.9—4）=8.6×2.9=8.6×（3—0.1）=8.6×3—8.6×0.1=25.8—0.86=24.94

Answer 3

8.6×6.9-34.4简便运算
34.4=8.6×4
所以原式=8.6×（6.9-4）
=8.6×2.9
=24.94

Answer 4

8.6×6.9-34.4
=8.6*（7-0.1）-34.4
=8.6*7-0.86-34.4
=60.2-35.26
=60-35.06
=24.94

Answer 5

8.6×6.9-34.4
＝8.6×6.9-8.6×4
＝8.6×（6.9-4）
＝8.6×2.9
＝8.6×（3-0.1）
＝25.8-0.86
＝24.94