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\(\frac{1}{5}+\frac{1}{7}+\frac{1}{3}+\frac{100}{125}+\frac{66}{77}+\frac{40}{60}\)
\(=\frac{1}{5}+\frac{1}{7}+\frac{1}{3}+\frac{4}{5}+\frac{6}{7}+\frac{2}{3}\)
\(=\left(\frac{1}{5}+\frac{4}{5}\right)+\left(\frac{1}{7}+\frac{6}{7}\right)+\left(\frac{1}{3}+\frac{2}{3}\right)\)
\(=1+1+1\)
\(=3\)
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\(A=132\times53+132\times47\)
\(\Leftrightarrow A=132\left(53+47\right)\)
\(\Leftrightarrow A=132\times100\)
\(\Leftrightarrow A=13200\)
\(\text{Vậy }A=13200\)
\(B=204\times13-204\times3\)
\(\Leftrightarrow B=204\left(13-3\right)\)
\(\Leftrightarrow B=204\times10\)
\(\Leftrightarrow B=2040\)
\(\text{Vậy }B=2040\)
A) 132*53+132*47
=132*(53+47)
=132*100
=13200
B) 204*13-204*3
=204*(13-3)
=204*10
=2040
a) 35 x 18 - 9 x 70 + 100
=35 x 18 - 9 x 35 x2 + 100
=35 x 18 - 18 x 35 + 100
=35 x ( 18 - 18 ) + 100
=35 x 0 + 100
=0 + 100
=100
35 x 18 - 9 x 70 + 100
= 35 x 18 - 9 x 35 x 2 + 100
= 35 x 18 - 18 x 35 + 100
= 100
1/2 x 6/7 x 2/3 x 7/8
= (1/2 x 7/8 ) x 6/7 x 2/3
= 7/16 x 12/21
= 1/16 x 12/3
= 1/16 x 4
= 4/16 = 1/4