简便运算0.35乘58加65乘0.42 - 知识问答

简便运算0.35乘58加65乘0.42

1个回答

0.35X58+0.42+65
=0.07X（5X58+6X65）
=0.07X (5X50+5X8+6X60+6X5)接着算就可以了
=0.07X(250+40+360+30)
=680X0.07
=(600+80)X0.07
=42+5.6=47.6

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