Question

tính nhanh

12 x 12

18x 12

20 x 12 

ai tích mik mik tích lại

Answer 1

12 x ( 10 + 2)

12x 10 + 12 x 2

= 120 + 24

=144

18 x (10+2)

18x10+18x2

=180+ 36

=216

20 x ( 10 + 2 )

20 x 10 + 20 x 2

=200+40=240

Answer 2

12 x 12 = 144

18 x 12 = 216

20 x 12 =240

Answer 3

12 x ( 10 + 2)

12x 10 + 12 x 2

= 120 + 24

=144

18 x (10+2)

18x10+18x2

=180+ 36

=216

20 x ( 10 + 2 )

20 x 10 + 20 x 2

=200+40=240

Answer 4

12 x ( 10 + 2)

12x 10 + 12 x 2

= 120 + 24

=144

18 x (10+2)

18x10+18x2

=180+ 36

=216

20 x ( 10 + 2 )

20 x 10 + 20 x 2

=200+40=240

Answer 5

12 x ( 10 + 2)

12x 10 + 12 x 2

= 120 + 24

=144

18 x (10+2)

18x10+18x2

=180+ 36

=216

20 x ( 10 + 2 )

20 x 10 + 20 x 2

=200+40=240

Answer 6

12 x ( 10 + 2)

12x 10 + 12 x 2

= 120 + 24

=144

18 x (10+2)

18x10+18x2

=180+ 36

=216

20 x ( 10 + 2 )

20 x 10 + 20 x 2

=200+40=240

haz nãy giờ chưa kiếm được tích nào cả

Answer 7

12 x 12

= 12 x ( 10 + 2 )

= 12 x 10 + 12 x 2

= 120 + 24

= 144

18 x 12 

= 18 x ( 10 + 2 )

= 18 x 10 + 18 x 2

= 180 + 36

= 216

20 x 12

= ( 10 + 10) x 12

= 10x12 + 10x12

= 120 + 120

= 240

Answer 8

12 x 12

= 12 x ( 10 + 2 )

= 12 x 10 + 12 x 2

= 120 + 24

= 144

18 x 12 

= 18 x ( 10 + 2 )

= 18 x 10 + 18 x 2

= 180 + 36

= 216

20 x 12

= ( 10 + 10) x 12

= 10x12 + 10x12

= 120 + 120

= 240

Answer 9

12 x 12

= 12 x ( 10 + 2 )

= 12 x 10 + 12 x 2

= 120 + 24

= 144

18 x 12 

= 18 x ( 10 + 2 )

= 18 x 10 + 18 x 2

= 180 + 36

= 216

20 x 12

= ( 10 + 10) x 12

= 10x12 + 10x12

= 120 + 120

= 240