8.42+8.67+8.58+8.50 简便计算

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8.42+8.67+8.58+8.50简便计算8.42+8.67+8.58+8.50简便计算8.42+8.67+8.58+8.50简便计算=(8.42+8.58)+(8.67+8.50)=17+17.

8.42+8.67+8.58+8.50 简便计算
8.42+8.67+8.58+8.50 简便计算

8.42+8.67+8.58+8.50 简便计算
=(8.42+8.58)+(8.67+8.50)
=17+17.17
=34.17

8.42+8.67+8.58+8.50
=8.42+8.58+8.50 +8.50+0.17
=17+17+0.17
=34.17

=34.17

34.17