Estimate and multiply a 2-digit by a 1-digit number using expanded and short multiplication | Maths

Starter quiz

483 can be partitioned as __________.
- 4 tens, 8 tens and 3 ones.
- 4 hundreds, 7 tens and 3 ones.
- 4 hundreds, 8 tens and 3 ones. ✓
- 4 hundreds, 80 tens and 3 ones.
Izzy is chanting her 7 times tables: ... 21, 28, 35, ___. What comes next?
- 40
- 41
- 42 ✓
- 43
Izzy is chanting her 7 times tables in descending order: ... 77, 70, 63, ______ . What comes next?
- '56' ✓
Use short multiplication to calculate this question: 56 × 3 = ______
- '168' ✓
Use expanded multiplication to calculate this question: 74 × 5= ______
- '370' ✓
Sam has 71 shiny cards, Izzy has 213 shiny cards. Izzy has ______ times as many.
- '3' ✓

To estimate for the calculation: 4 × 72, 72 is between __________.
- 60 and 70
- 70 and 80 ✓
- 65 and 70
Select the correct number to complete the estimation.
- 28
- 74
- 208
- 280 ✓
Write the correct number to complete the estimation.
- '360' ✓
Select an appropriate estimation for 63 × 3
- 65 × 3
- 60 × 3 ✓
- 70 × 3
- 6 × 3
Use estimation to decide which has a suitable answer for this multiplication: 46 × 3
- A ✓
- B
Solve the worded problem using short multiplication: In one month 34 cups of lemonade are sold. The following month, six times as many are sold. How many cups of lemonade were sold that month?
- '204' ✓

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Use times tables and place value to estimate the product of a 2-digit by a 1-digit multiplication.
Use expanded short multiplication to multiply a 2-digit by a 1-digit number.
Use short multiplication to multiply a 2-digit by a 1-digit number.

Pupils may find it difficult to identify the multiples of 10 a number is between when estimating.

Provide a number line and continue to use stem sentences to support pupils in their thinking.

Estimation - To find a value that is close enough to the right answer, usually with some thought or calculation involved is known as estimation.