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42731−(7502−356×4)
=42731−(7502−1424)
=42731−6078
=36653
Đáp án B
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\(\dfrac{11}{2}\): \(\dfrac{1}{4}\) \(\times\) \(\dfrac{5}{3}\)
= \(\dfrac{11}{2}\) \(\times\) \(\dfrac{4}{1}\) \(\times\) \(\dfrac{5}{3}\)
= 22 \(\times\) \(\dfrac{5}{3}\)
= \(\dfrac{110}{3}\)
\(\dfrac{5}{2}-\dfrac{1}{4}+\dfrac{5}{3}\)
= \(\dfrac{30}{12}-\dfrac{3}{12}+\dfrac{20}{12}\)
= \(\dfrac{7}{12}\)
\(\dfrac{14}{5}\times\dfrac{2}{3}\)+ 5
= \(\dfrac{28}{15}\) + 5
= \(\dfrac{28}{15}\) + \(\dfrac{75}{15}\)
= \(\dfrac{103}{15}\)
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a. 47× 6 + 505 : 5
= 282 + 101
= 383
b. 4365 – 4265 + ( 150 : 3 – 40 )
= 100 + (50 – 40)
= 100 + 10
= 110
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\(\dfrac{1}{3}\cdot\dfrac{1}{4}+\dfrac{7}{4}:3-\dfrac{2}{3}\)
\(=\dfrac{1}{12}+\dfrac{7}{12}-\dfrac{8}{12}\)
\(=\dfrac{0}{12}=0\)
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7024 x 4 - 40480 : 5 = 28096 - 40480 : 5 =28096 - 8096 =20000
= 4365-4265+10
=100+10
=110
4365 -4265 + [150:3-40] = 4365 - 4265 + [50 - 40] = 4365 - 4265 + 10 = 100 + 10 = 110 2356 + 1997 + 703 = 4353 + 703 = 5056