(20.01+20.02+20.03+20.04+20.05+20.06+20.07+20.08+20.09)÷9简便~

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/18 20:40:50
(20.01+20.02+20.03+20.04+20.05+20.06+20.07+20.08+20.09)÷9简便~(20.01+20.02+20.03+20.04+20.05+20.06+20.

(20.01+20.02+20.03+20.04+20.05+20.06+20.07+20.08+20.09)÷9简便~
(20.01+20.02+20.03+20.04+20.05+20.06+20.07+20.08+20.09)÷9
简便~

(20.01+20.02+20.03+20.04+20.05+20.06+20.07+20.08+20.09)÷9简便~
20.04+20.06=40.10=2*20.05,20.03+20.07=40.10=2*20.05...
括号内总共有9个20.05相加,除以9得20.05

=(20乘9+0.01+0.09+0.04+0.06+0.05+0.07+0.03+0.08+0.02)除以9
=(180+0.1+0.1+0.1+0.1+0.05)除以9
=180.45除以9
=20.05