Question

61.8×2.5×61.8×4怎么简便运算？

Answer 1

答，原式＝61.8×61.8×（2.5×4）＝61.8×61.8×10＝61.8×618＝61.8×600+61.8x10+61.8×8＝37080+618+494.4＝37698+494.4＝38098+94.4＝38188+4.4＝38192.4

Answer 2

2.5x4=10
61.8ⅹ61.8x2.5ⅹ4=61.8x61.8x10=61.8x618=38192.4

Answer 3

原式
=61.8x（2.5x4）
=61.8X10
=618