Question

16．簡(jiǎn)算
3.84×7.6+0.76×61.6       
9.99×222+3.33×333+3.33．

Answer 1

分析 ①先變形為3.84×7.6+7.6×6.16，再根據(jù)乘法分配律簡(jiǎn)便計(jì)算；
②先變形為3.33×666+3.33×333+3.33×1，再根據(jù)乘法分配律簡(jiǎn)便計(jì)算．

解答 解：①3.84×7.6+0.76×61.6
=3.84×7.6+7.6×6.16
=7.6×（3.84+6.16）
=7.6×10
=76

②9.99×222+3.33×333+3.33
=3.33×666+3.33×333+3.33×1
=3.33×（666+333+1）
=3.33×1000
=3330

點(diǎn)評(píng) 考查了運(yùn)算定律與簡(jiǎn)便運(yùn)算，靈活運(yùn)用所學(xué)的運(yùn)算律簡(jiǎn)便計(jì)算．