a) 86*(121-120+9)==86*10=860
b)136*(75+19+6)=136*100=13600
Mk giải r đó nha chắc chắn đúng
chao ban! Day la cau tra loi cua mh!
a,86*121-86*120+86*9
=86*(121-120+9)
=86*10
=860
b,136*75+136*19+136*6
=136*(75+19+6)
=136*100
=13600
Chuc ban hoc tot!!!
a)86 x (121-120+9)=860
b)136 x (75+19+6)=13600
a) 86 x 121 - 86 x 120 +86 x9
= 86 x (121 - 120 + 9 )
= 86 x 10
= 860
b) 136 x 75 +136 x 19 + 136 x 6
= 136 x ( 75 + 19 +6 )
= 136 x 100
= 13600
a,86 x 121 - 86 x 120 + 86 x 9
= 86 x ( 121 - 86 + 9 )
= 86 x 10
= 860
b,136 x 75 + 136 x 19 + 136 x 6
= 137 x ( 75 + 19 + 6 )
= 137 x 100
= 13700
a) 86 x 121 - 86 x 120 +86 x9
= 86 x (121 - 120 + 9 )
= 86 x 10
= 860
b) 136 x 75 +136 x 19 + 136 x 6
= 136 x ( 75 + 19 +6 )
= 136 x 100
= 13600
a, 10406 - 10320 + 774
=860
b, 10200 + 2584 + 816
=13600
a, = 86 x (121 - 120 + 9) b , = 136 x ( 75 + 19 + 6 )
= 86 x 10 = 136 x 100
= 860 = 13600
