Partition two-digit numbers into tens and ones | Maths

Starter quiz

Which of the following bar models represents 62?
If we combine the parts, what will the whole amount be?

46 p ✓

64 p

10p
What is the missing part in the part-part-whole model?

'1' ✓
What is the missing part in the bar model?

'60' ✓
Each number has been partitioned into tens and ones. Which number has been partitioned correctly?
Lucas has some 10 p and some 1 p coins in his pocket. Altogether, he has 47 p in his pocket. How many of each coin does he have?

Seven 10 p coins and four 1p coins.

Four 10 p coins and four 1 p coins.

Seven 1 p coins and four 10 p coins. ✓

Exit quiz

If we combine the parts, what will the whole amount be?

12

48

84 ✓
Which of the following part-part-whole models represents 56?
What is the missing part in the bar model?

'70' ✓
35 has been partitioned into tens and ones. What is the missing number? 35 can be partitioned into ___ and 5

'30' ✓
What is the missing part in the part-part-whole model?

'8' ✓
Which bar model shows 52 partitioned correctly?

Worksheet

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Lesson Details

Key learning points

Two-digit numbers can be partitioned into tens and ones.
The order of the digits indicates their value.

Common misconception

Children may reverse the digits in a two-digit number, not understanding the value of each digit, or partition, for example, 54 into 5 and 4

Return to the use of practical equipment and ask children to prove they are right using it. They could also explain their ideas to a friend to encourage them to spot their own errors.

Keywords

Partition - To split a whole up into parts.
Combine - To put parts together to make a whole.
Part - A piece or section of a whole.
Whole - All of something; complete.