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Home / Practice / Maths
Adding and subtracting money, and multiplying or dividing by 10, 100 and 1,000.
Question 1 of 12
Ivy has £8.94. She spends £3.03 at the sports shop. How much does she have left?
Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £8.94 − £3.03 = £5.91. Working in pence avoids the point altogether: 894 − 303 = 591 pence, which is £5.91. Line up the decimal points, not the ends of the numbers. That one habit removes most decimal errors.
The answer is D. Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £8.94 − £3.03 = £5.91. Working in pence avoids the point altogether: 894 − 303 = 591 pence, which is £5.91. Line up the decimal points, not the ends of the numbers. That one habit removes most decimal errors.
Work out 36.32 ÷ 100.
Dividing by 100 moves every digit 2 places to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 36.32 ÷ 100 = 0.3632. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
The answer is C. Dividing by 100 moves every digit 2 places to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 36.32 ÷ 100 = 0.3632. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
Work out 59.85 × 1000.
Multiplying by 1000 moves every digit 3 places to the left. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 59.85 × 1000 = 59,850. Fill any empty columns with zeros rather than leaving gaps.
The answer is C. Multiplying by 1000 moves every digit 3 places to the left. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 59.85 × 1000 = 59,850. Fill any empty columns with zeros rather than leaving gaps.
Work out 33.78 × 1000.
Multiplying by 1000 moves every digit 3 places to the left. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 33.78 × 1000 = 33,780. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
The answer is C. Multiplying by 1000 moves every digit 3 places to the left. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 33.78 × 1000 = 33,780. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
Work out 65.03 ÷ 10.
Dividing by 10 moves every digit 1 place to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 65.03 ÷ 10 = 6.503. Fill any empty columns with zeros rather than leaving gaps.
The answer is B. Dividing by 10 moves every digit 1 place to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 65.03 ÷ 10 = 6.503. Fill any empty columns with zeros rather than leaving gaps.
Work out 95.02 × 100.
Multiplying by 100 moves every digit 2 places to the left. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 95.02 × 100 = 9,502. Fill any empty columns with zeros rather than leaving gaps.
The answer is D. Multiplying by 100 moves every digit 2 places to the left. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 95.02 × 100 = 9,502. Fill any empty columns with zeros rather than leaving gaps.
Martha buys a book for £9.17 and a card for £4.77 at the garden centre. How much does she spend altogether?
Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £9.17 + £4.77 = £13.94. Working in pence avoids the point altogether: 917 + 477 = 1394 pence, which is £13.94. Write both amounts with two decimal places before starting, even if one ends in a zero.
The answer is B. Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £9.17 + £4.77 = £13.94. Working in pence avoids the point altogether: 917 + 477 = 1394 pence, which is £13.94. Write both amounts with two decimal places before starting, even if one ends in a zero.
Work out 63.71 ÷ 10.
Dividing by 10 moves every digit 1 place to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 63.71 ÷ 10 = 6.371. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
The answer is D. Dividing by 10 moves every digit 1 place to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 63.71 ÷ 10 = 6.371. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
Tomasz has £8.99. She spends £4.73 at the market stall. How much does she have left?
Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £8.99 − £4.73 = £4.26. Working in pence avoids the point altogether: 899 − 473 = 426 pence, which is £4.26. Turning pounds into pence makes it ordinary whole-number arithmetic. Turn it back at the end.
The answer is B. Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £8.99 − £4.73 = £4.26. Working in pence avoids the point altogether: 899 − 473 = 426 pence, which is £4.26. Turning pounds into pence makes it ordinary whole-number arithmetic. Turn it back at the end.
Nadia has £8.37. She spends £1.66 at the farm shop. How much does she have left?
Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £8.37 − £1.66 = £6.71. Working in pence avoids the point altogether: 837 − 166 = 671 pence, which is £6.71. Write both amounts with two decimal places before starting, even if one ends in a zero.
The answer is B. Money is decimals with two places, so line the amounts up by the decimal point rather than by the last digit. £8.37 − £1.66 = £6.71. Working in pence avoids the point altogether: 837 − 166 = 671 pence, which is £6.71. Write both amounts with two decimal places before starting, even if one ends in a zero.
Work out 63.23 ÷ 10.
Dividing by 10 moves every digit 1 place to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 63.23 ÷ 10 = 6.323. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
The answer is B. Dividing by 10 moves every digit 1 place to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 63.23 ÷ 10 = 6.323. Multiplying makes it bigger, dividing makes it smaller. Check the direction before writing anything down.
Work out 81.72 ÷ 1000.
Dividing by 1000 moves every digit 3 places to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 81.72 ÷ 1000 = 0.08172. Say it as digits moving, not as the point moving. The two give the same answer here and different answers later.
The answer is B. Dividing by 1000 moves every digit 3 places to the right. The decimal point does not move — the digits do, which is the way it is taught now and the way that keeps working with larger numbers. 81.72 ÷ 1000 = 0.08172. Say it as digits moving, not as the point moving. The two give the same answer here and different answers later.
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