9999×7778＋3333×6666=?5.6×69.32＋138.64×0.05＋693.2×0.43=?用简便算法

Question

9999×7778＋3333×6666=?
5.6×69.32＋138.64×0.05＋693.2×0.43=?
用简便算法

Answer 1

你好1016706824
步骤如下：
9999*7778+3333*6666
=9999*7778+3333*3*2222
=9999*7778+9999*2222
=9999*(7778+2222)
=9999*10000
=99990000
5.6*69.32+138.64*0.05+693.2*0.43
=5.6*69.32+69.32*2*0.05+69.32*10*0.43
=5.6*69.32+69.32*0.1+69.32*4.3
=69.32*(5.6+0.1+4.3)
=69.32*10
=693.2
希望能给你带来帮助
祝好!