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Number Partitioning Practice
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Number Partitioning Practice
Break numbers into hundreds, tens and ones. Use your partitions to work out each calculation.
Partition numbers
1.Write 72 as tens and ones, then as an addition sentence.
2.Show two ways to split 146 into parts. Use three parts for one way and two parts for the other.
3.Which addition sentence shows 93 partitioned into tens and ones?
- 90 + 3
- 9 + 3
- 80 + 13
- 100 + 3
4.Match each number with one correct partition.
- 1) 218
- 2) 305
- 3) 346
- 4) 470
- B) 200 + 10 + 8
- D) 400 + 70
- C) 300 + 5
- A) 300 + 40 + 6
Add by partitioning
5.Work out 36 + 42 by adding the tens and then the ones. Show your partitions.
6.Use partitioning to calculate 137 + 25. Show how you split both numbers.
7.Choose a useful way to split 64 + 29 so you can add the ones to make a ten.
- 60 + 4 and 20 + 9
- 60 + 4 and 20 + 10 − 1
- 60 + 4 and 29 + 0
- 60 + 4 and 20 + 6 + 3
8.Calculate 248 + 31 using place-value parts. Record your steps.
Subtract by partitioning
9.Work out 76 − 34 by subtracting tens and ones separately.
10.Use partitioning to calculate 184 − 52. Show your number parts and working.
Solve and explain
11.Amira has 163 beads and gives 21 to her cousin. How many beads remain? Use partitioning to work it out.
12.A wildlife centre counts 126 birds in the morning. Later, 38 more arrive. How many birds are there altogether? Show a partitioning strategy.
13.Select every correct partition of 384.
- 300 + 80 + 4
- 380 + 4
- 300 + 84
- 340 + 44
- 200 + 180 + 4
14.In one or two sentences, explain how splitting a number into place-value parts can help with addition or subtraction. Include an example.
15.Show 172 as hundreds, tens and ones using a place-value drawing.
4 printable pages
Page 1
Page 2
Page 3
Page 4
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