Question

4 x 51 x 7 + 2 x 86 x 7 + 12 x 2 x 7 =

 

Answer 1

4 x 51 x 7 + 2 x 86 + 7 + 12 x 2 x 7

= 2 x 7 x 2 x 51 + 2 x 2 x 7 x 43 + 2 x 2 x 7 x 6

= 2 x 2 x 7 x ( 51 + 43 + 6 )

= 28 x 100

= 2800

Answer 2

4 x 51 x 7 + 2 x 86 x 7 + 12 x 2 x 7 = ...... 204 x 7 + 172 x 7 + 24 x 7 = ..... 7 x ( 204 + 172 + 24)= ... 7 x 400 = 2 800 .

Answer 3

   4 x 51 x 7 + 2 x 86 x 7 + 12 x 2 x 7

= 2 x 2 x 51 x 7 + 2 x 2 x 7 x 43 + 2 x 2 x 7 x 6

= 2 x 2 x 7 x ( 51 + 43 + 6)

= 28 x 100

= 2800

Answer 4

\(\text{Ta có: 4 x 51 x 7 + 2 x 86 x 7 + 12 x 2 x 7 }\)
\(\text{= 2 x 2 x 51 x 7 + 2 x 2 x 7 x 43 + 2 x 2 x 7 x 6}\)
\(\text{= 2 x 2 x 7 x ( 51 + 43 + 6) }\)

\(\text{= 28 x 100 = 2800}\)

Answer 5

    4 x 51 x 7 + 2 x 86 + 7 + 12 x 2 x 7

= 2 x 7 x 2 x 51 + 2 x 2 x 7 x 43 + 2 x 2 x 7 x 6

= 2 x 2 x 7 x ( 51 + 43 + 6 )

= 28 x 100

= 2 800

Vậy: 4 x 51 x 7 + 2 x 86 x 7 + 12 x 2 x 7 = = 2 800

Answer 6

KQ là 2800

Answer 7

=2800 nhé

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