Question

四点8×0点二七 0点五二×2点七的简便运算

四点8×0点二七 0点五二×2点七的简便运算

Answer 1

4.8X0.27 = 4.8X(0.25+0.02) = 1.2 + 0.096 = 1.296

0.52*2.7 = (0.5+0.02)X2.7 = 1.35+0.054 = 1.404.

Answer 2

4.8*0.27+0.52*2.7=（4.8+0.52*10）*0.27=10*0.27=2.7。