Question

1.Tính thuận tiện

a,4,8x1,35+5,5x4,8+4,8

b,3/7x11/5+4/7x11/5

ai làm minh tick

Answer 1

1.Tính thuận tiện

a,4,8x1,35+5,5x4,8+4,8

=4,8x(1,35+5,5+1)

=4,8x7,85

=37,68

b,3/7x11/5+4/7x11/5

=(3/7+4/7)x11/5

=1 x 11/5

=11/5

Answer 2

a,4.8x1.35+5.5x4.8+4.8=37.68

b,3/7x11/5+4/7x11/5=11/5

NEU LAM CACH THUAN TIEN NHU SAU

a,to ko viet lai de bai nua giai luon day

=>4.8x(1.35+5.5+1)=4.8x7.85=37.68

=>11/5x(3/7+4/7)=11/5x1=11/5

xong roi do

Answer 3

a. 4,8 x 1,35 + 5,5 x 4,8 + 4,8

= 4,8 x 1,35 + 5,5 x 4,8 + 4,8 x 1

= 4,8 x ( 1,35 + 5,5 + 1 )

= 4,8 x         7,85

=      37,68

b. 3/7 x 11/5 + 4/7 x 11/5

= 11/5 x ( 3/7 + 4/7 )

= 11/5 x       7/7

= 11/5 x        1

=       11/5