**Question 5**:

Calculate the value of $\frac{4}{5}+15.4\xf74$ and express the answer correct to one decimal place.

**Solution**:$\begin{array}{l}\frac{4}{5}+15.4\xf74\\ =\frac{4}{5}+3.85\\ =0.8+3.85\\ =4.65\\ =4.7\text{(onedecimalplace)}\end{array}$

**Question 6**:

Calculate the value of 84 – 3(14 + 48 ÷ 6) =

**Solution**:$\begin{array}{l}84-3\left(14+48\xf76\right)\\ =84-3\left[14+\left(48\xf76\right)\right]\\ =84-3\left(14+8\right)\\ =84-3\left(22\right)\\ =84-66\\ =18\end{array}$

**Question 7**:

$\text{Calculatethevalueof}\frac{4\times 0.18}{0.9}.$

**Solution**:$\begin{array}{l}\frac{4\times 0.18}{0.9}=\frac{0.72}{0.9}\\ \text{}=\frac{0.72\times 10}{0.9\times 10}\\ \text{}=\frac{7.2}{9}\\ \text{}=0.8\end{array}$

**Question 8**:

$\begin{array}{l}\text{Calculatethevalueof}\left(8.4-2.64\right)\xf7\frac{4}{3}\text{andexpresstheanswercorrect}\\ \text{totwodecimalplaces}\text{.}\end{array}$

**Solution**:$\begin{array}{l}\left(8.4-2.64\right)\xf7\frac{4}{3}\\ ={\overline{)5.76}}^{1.44}\times \frac{3}{\overline{)4}}\\ =4.32\end{array}$