9999*7778+3333*6666 5.6*69.32+138.64*0.05+693.2*0.43 用简便运算
问题描述：
9999*7778+3333*6666 5.6*69.32+138.64*0.05+693.2*0.43 用简便运算
答
9999*7778+3333*6666
=9999*7778+9999*2222
=9999*（7778+2222）
=9999*10000
=99990000
第二题
5.6*69.32+138.64*0.05+693.2*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
答
9999×7778+3333×6666=9999×7778+3333×3×2222=9999×7778+9999×2222=9999×(7778+2222)=9999×10000=999900005.6×69.32+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+69.3...