Question

简便计算 1、32.45 × 1/6 + 4.75 ÷ 6 2、48 × 31 + 31 × 51 + 31

Answer 1

1、

32.45 × 1/6 + 4.75 ÷ 6

=32.45 × 1/6 + 4.75 × 1/6

=（32.45 +4.75）× 1/6

=（37.2）× 1/6

=6.2

2、

48 × 31 + 31 × 51 + 31

=31 ×（48+51+1）

=31 ×100

=3100