Question

tính nhanh :

2 x 7 + 7 x 8 + 7 x 9 + 7 x 1 

Answer 1

2.7+7.8+7.9+7.1

=7.(2+8+9+1)

=7.20

=140

Answer 2

2 x 7 + 7 x 8 + 7 x 9 + 7 x 1 

= 7 x ( 2 + 8 + 9 + 1 )

= 7 x 20

= 14 x 10

= 140 

Answer 3

2 × 7 + 7 × 8 + 7 × 9 + 7 × 1

= 7 × (2 + 8 + 9 + 1)

= 7 × 20

= 140.

Answer 4

2 x 7 + 7 x 8 + 7 x 9 + 7 x 1

= 7 x ( 2 + 8 + 9 + 1 )

= 7 x   20  = 140

Answer 5

2 x 7 + 7 x 8 + 7 x 9 + 7 x 1 

= 7 x ( 2 + 8 + 9 + 1 )

= 7 x 20

= 140

Answer 6

2 x 7 +  7 x 8 +  7 x 9 +  7 x 1

= 7 x ( 7 + 8 + 9 + 1)

= 7 x 25 

=  175

Answer 7

2 x 7 + 7 x 8 + 7 x 9 + 7 x 1

= 7 x (2 + 8 + 9 + 1)

= 7 x 20

= 140

Ủng hộ tíck mik nha !!!

Answer 8

2x7+7x8+7x9+7x1=7(2+8+9+1)=7x20=140