Question

[๖²⁴ʱᗷé ᗰOᑎ︵❣]

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

[Nguyễn Hữu Đức]

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

[Phan Khoa Nguyên]

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