Question

三分之二加八分之五的和乘二点四过程用简便计算

三分之二加八分之五的和乘二点四过程用简便计算

Answer 1

（2/3+5/8）x2.4
=2x0.8+5x0.3
=1.6+1.5
=3.1

Answer 2

（2/3+5/8）×2.4
=2/3×2.4+5/8×2.4
=1.6+1.5
=3.1