Question

Bài 1:Tính hợp lý

a) 36 x 19 + 36 x 81

b) 8 x 12 x 125 x 5

c) \(\frac{7 x 9 + 14 x 27 + 21 x 36}{21 x 27 + 42 x 81 + 63 x 108}\)

 

Answer 1

\(a,36.19+36.81\)

\(=36.\left(19+81\right)\)

\(=36.100\)

\(=3600\)

\(b,8.12.125.5\)

\(=\left(125.8\right)\left(12.5\right)\)

\(=1000.60\)

\(=60000\)

\(c,\)chịu 

Answer 2

c,7 x 9 + 14 x 27 + 21 x 36 / 21 x 27 + 42 x 81 + 63 x 108

7 x 9 + 14 x 27 + 21 x 36 / 7 x 3 x 9 x 3 + 14 x 3 x 27 x 3 + 21 x 3 x 36 x 3

1 / 3 x 3 + 3 x 3 + 3 x 3

1 / 9 + 9 + 9

1 / 27

Answer 3

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