Question

tính nhanh 

a) 1/2 x 3/4 + 1/2 x 1/4 

b) 3/5 x 1/8 + 3/5 x 23/8

cả con a và b nhé

Answer 1

a)1/2x3/4+1/2x1/4

=1/2x(3/4+1/4)

=1/2x1

=1/2

b)3/5x1/8+3/5x23/8

=3/5x(1/8+23/8)

=3/5x3

=9/5

HT NHKK

Answer 2

a) 1/2 x 3/4 + 1/2 x 1/4 = 3/8 + 1/8 = 4/8

b) 3/5 x 1/8 + 3/5 x 23/8 = 3/40 + 69/40 = 72/40 = 9/5

Answer 3

a) 1/2 x 3/4 + 1/2 x 1/4 

=1\2x(3\4+1\4)

=1\2x1

=1\2

b) 3/5 x 1/8 + 3/5 x 23/8

=3\5x(1\8+23\8)

=3\5x3

=9\5

Answer 4

1/4 × 1/3 + 3/12 × 1/2 + 7/4 × 5/6

Cíu tui ai làm tui tick choa Ò_ó