Multiply a 3-digit by a 1-digit number with multiple regroups | Maths

Starter quiz

Order the multiplication equations in ascending order.

1

⇔

7 × 8

2

⇔

6 × 7

3

⇔

7 × 4

4

⇔

3 × 8

5

⇔

9 × 0
___ and ___ are the partial products in this expanded multiplication.

14 and 42

42 and 140 ✓

182 and 42

26 and 7
There are ___ instances of regrouping.

0

1

2 ✓

3
True or false: 2 tens have been regrouped from the ones to the tens.

True
False ✓
Find the missing number.

'3' ✓
Find the missing number.

'6' ✓

Match the factor pair to the correct product.

3 × 3

⇔

9 ✓

4 × 7

⇔

28 ✓

7 × 7

⇔

49 ✓

8 × 9

⇔

72 ✓

9 × 3

⇔

27 ✓
Find the missing partial product in this expanded multiplication.

'240' ✓
Look at Andeep's calculation. How many times did he regroup?

0 regroup

1 regroup

2 regroups ✓

3 regroups
Match the equation to the correct partial product expression.

3 × 203

⇔

600 + 9 ✓

216 × 3

⇔

600 + 30 + 18 ✓

5 × 203

⇔

1000 + 15 ✓

216 × 5

⇔

1000 + 50 + 30 ✓
Use short or expanded to solve: 487 × 6 Write the answer in numeral form.

'2922' ✓
Look at the image. How many cakes did Jacob bake?

'3,192' ✓

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If the product of the ones digits is greater than 10 then you regroup ten ones into one ten.
If the product of the 1-digit number and the tens digit is greater than 100 then you regroup ten 10s into one 100
If the product of the 1-digit number and the 100s digit is greater than 1,000 then you regroup ten 100s into one 1,000

Incorrectly regrouping or forgetting to record a regrouped amount.

Clear teacher modelling. 'What does this digit represent?' 'Where do we place the regrouped amount?'

Short multiplication - A way of recording using columns to set out and calculate a multiplication.
Expanded multiplication - A way of recording the steps of a calculation focusing on partitioning one or more factors and showing partial products.
Regroup - The process of unitising and exchanging between place values is known as regrouping.