3x7+7x7+10x10
=(3+7)x7+100
=10x7+100
=70+100
=170
ai k mình k lại
3x7+7x7+10x10
=7x(3+7) + 10x10
=7x10 + 10x10
=10x(7+10)
=10x17
=170
3 x 7 + 7x 7 + 10 x 10
= 7 x (3 + 7) + 100
= 7 x 10 + 100
=70 + 100
= 170
3x7+7x7+10x10
=(3+7).7+10.10
=10.7+10.10
=70+100
=170
3 x 7 + 7 x 7 + 10 x 10
= 21 + 49 + 100
= 70 + 100
= 170
3 x 7 + 7 x 7 + 10 x 10
= 21 + 49 + 100
= 70 + 100
= 170
3 x 7 + 7x 7 +10x 10 = 170
k mk nha 
Nguyễn Thị Nhàn
(3x7)+(7x7)+(10x10)
=21+49+100
=70+100
=170
