Question

Answer 1

a/ =4
b/ =10

Answer 2

a/ \(\dfrac{3}{8}+2^2-\dfrac{3}{8}\)

\(=\dfrac{3}{8}+4-\dfrac{3}{8}\)

\(=\dfrac{3}{8}+\dfrac{32}{8}-\dfrac{3}{8}\)

\(=\dfrac{35}{8}-\dfrac{3}{8}\)

\(=\dfrac{32}{8}=4\)

Answer 3

b/ \(\dfrac{2}{5}.33\dfrac{1}{3}-\dfrac{2}{5}.8\dfrac{1}{3}\)

= \(\dfrac{2}{5}.\dfrac{100}{3}-\dfrac{2}{5}.\dfrac{25}{3}\)

= \(\dfrac{2}{5}.\left(\dfrac{100}{3}-\dfrac{25}{3}\right)\)

= \(\dfrac{2}{5}.\dfrac{75}{3}\)

= \(\dfrac{2}{5}.25\)

= \(10\)

Answer 4

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