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In-depth Investigation: Nine AGAIN
Children subtract 5-digit numbers and look for patterns in the digital roots.
Day 1
Use place value to add and subtract with 2-, 3- and 4-digit numbers.
Day 2
Use place value and number facts to add and subtract amounts of money.
In-depth Investigation: Total £10
Using only digits 1-9 without the ‘5’, children find all possible pairs of amounts to make £10.
Day 1
Bonds to £1: number facts (pre-requisite skills)
Suggested for Day 2
Pieces of cheese: successive subtraction with weights to 3-digit decimals (simmering skills)
Day 3
Change from £20: 4-digit mental subtraction (pre-requisite skills)
Suggested for Day 4
24-hour clock: 4-digit mental subtraction (simmering skills)
Day 1
Work out totals and calculating change: ‘Shopping in Town’.
Day 2
Work out the cheapest place to buy new athletics gear by finding the difference.
Day 3
Choose methods of subtraction.
Day 4
Use subtraction to choose an aquarium and fish to suit different budgets.
Perfect Pairs
Using place value to add and subtract amounts of money (without crossing multiples of 10p and one pound)