简便运算0.35乘58加65乘0.42_数学解答

简便运算0.35乘58加65乘0.42

人气：481 ℃　时间：2020-01-19 23:57:30

解答

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