Question

9x1+9x7+9x2=?

Answer 1

9.1+9.7+9.2

=9.(1+7+2)

=9. 10

=  90

Answer 2

9x1+9x7+9x2

=9(1+7+2)

=9x10

=90

tíc mình nha

Answer 3

\(9x1+9x7+9x2\)

\(=9x\left(1+7+2\right)\)

\(=9x10\)

\(=90\)

Answer 4

số đó là

9+63+18

=72+18

=90

ai thấy đúng thì k nha

Answer 5

\(=9\times\left(1+7+2\right)=9\times10=90\)

Answer 6

=9+63+18

=72+18

=90

Answer 7

\(9\cdot1+9\cdot7+9\cdot2=9\cdot\left(1+7+2\right)\)

                                       \(=9\cdot10\)

                                               \(=90\)

Answer 8

9 × 1 + 9 × 7 + 9 × 2 = 9 × (1 + 7 + 2) = 9 × 10 = 90.

Answer 9

\(9\times\left(1+7+2\right)\)

=\(9\times10\)

=\(90\)

Answer 10

9x1+9x7+9x2

=9x(1+9+2)

=9x12

=108

Answer 11

9 x 1 + 9 x 7 + 9 x 2 

= 9 x ( 1 + 7 + 2 )

= 9 x 10

= 90

Answer 12

= 9x(1+7+2)

=9x10

=90