Question

Kết quả tính:13,57 x 5,5 + 13,57 x 4,5 là:

A.1,357         B.13,57       C.135,7        D.1357

Cách làm:

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Answer 1

\(13,57\times5,5+13,57\times4,5\)

\(=13,57\times\left(5,5+4,5\right)\)

\(=13,57\times10\)

\(=135,7\)

Chọn C

Answer 2

Chọn C

13,57*5,5+13,57*4,5

=13,57(5,5+4,5)

=13,57*10

=135,7

Answer 3

\(13,57\times5,5+12,57\times4,5\)

\(=13,57\times\left(4,5+5,5\right)\)

\(=13,57\times10\)

\(=135,7\)

⇒ Chọn C