Question

  Giải chi tiết giúp mình đc hok ạ

Answer 1

\(a,33\times99=33\times100-33=3300-33=3267\\ b,25\%\times3+7\times\dfrac{1}{4}=\dfrac{1}{4}\times3+7\times\dfrac{1}{4}=\left(3+7\right)\times\dfrac{1}{4}=10\times\dfrac{1}{4}=\dfrac{5}{2}\)

Answer 2

\(c,\\ \dfrac{75}{100}\times16+4\times\dfrac{3}{4}\\ =\dfrac{3}{4}\times16+4\times\dfrac{3}{4}\\ =\left(16+4\right)\times\dfrac{3}{4}=20\times\dfrac{3}{4}=15\\ d,\\ 35\times99+35=35\times\left(99+1\right)=35\times100=3500\)

Answer 3

\(e,\\ \dfrac{6,25\times4\times18,84:0,5}{1,25:0,25\times10\times6,28}=\dfrac{\left(1,25\times5\right)\times4\times\left(6,28\times3\right)\times2}{1,25\times4\times10\times6,28}\\ =\dfrac{1,25\times10\times4\times6,28\times3}{1,25\times4\times10\times6,28}=3\)