Question

Tính = cách thuận tiện nhất:

5/12x2/3+2/3x7/12+1/3

Answer 1

2/3x(5/12+7/12)+1/3

2/3x       1        +1/3

2/3+1/3

=1              k mik nhaaaaa

Answer 2

5/12×2/3+2/3×7/12+1/3

=2/3×(5/12+7/12)+1/3

=2/3×          1          +1/3

=              2/3           +1/3

=                       1

Answer 3

\(\frac{5}{12}.\frac{2}{3}+\frac{2}{3}.\frac{7}{12}+\frac{1}{3}\)

\(=\frac{2}{3}.\left(\frac{5}{12}+\frac{7}{12}\right)+\frac{1}{3}\)

\(=\frac{2}{3}.\frac{12}{12}+\frac{1}{3}\)

\(=\frac{2}{3}.1+\frac{1}{3}\)

\(=\frac{2}{3}+\frac{1}{3}\)

\(=\frac{3}{3}=1\)

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