1.2 The four operations — Practise with help

1. $406$.
2. $0.07$.
3. $0.5 = 0.50 > 0.45$.

Write $146$ as $146.0$ so the tenths column is visible, then align the columns.

$146.0 + 27.5 = 173.5$.

Write $52.4$ as $52.40$ so both numbers have two decimal places.

$52.40 - 8.75 = 43.65$.

Split $23$ into $20$ and $3$: find $46 \times 20$ and $46 \times 3$, then add.

$46 \times 20 = 920$ and $46 \times 3 = 138$, so $46 \times 23 = 1058$.

Work out $37 \times 4$, then replace the decimal point (one decimal place).

$37 \times 4 = 148$, so $3.7 \times 4 = 14.8$.

You can divide the whole number part and the tenths separately: $8 \div 4 = 2$ and $1.6 \div 4 = 0.4$.

$9.6 \div 4 = 2.4$.

Divide: $8.40 \div 12$. Check by multiplying your answer by $12$.

$8.40 \div 12 = 0.70$, so one pen costs 70p. Check: $12 \times 0.70 = 8.40$. ✓

Find each amount separately, then add.

$95 \times 1.20 = 114$ and $6 \times 3.00 = 18$, so the total taken is $114 + 18 = £132$.