Question

tính bằng cách thuận tiện

b, 4 x 826 x 125 x 2

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Answer 1

\(4\times826\times125\times2\\=(4\times2\times125)\times826\\=(8\times125)\times826\\=1000\times826\\=826000\)

Answer 2

\(4\times826\times125\times2\)

\(=\left(4\times125\times2\right)\times826\)

\(=\left(500\times2\right)\times826\)

\(=1000\times826\)

\(=826000\)