Question

21.3+22.78÷3.4简便计算？

简便计算

Answer 1

21.3+22.78÷3.4
=21.3+227.8÷34
=21.3+6.7
=28
就脱式计算吧。

Answer 2

21.3+22.78÷3.4
=21.3+6.7
=20+1.3+6.7
=20+8
=28

Answer 3

21.3+22.78÷3.4
=21.3+227.8÷34
=21.3+6.7
=28

Answer 4

∵21.3十6.7
二28