# Predicting the size of a product

I can explain how to use the size of one number in a multiplication to predict the size of the product.

# Predicting the size of a product

I can explain how to use the size of one number in a multiplication to predict the size of the product.

## Lesson details

### Key learning points

- If one factor is made ___ times the size and the other factor remains the same, the product will be ___ times the size.
- When a number is multiplied by a value less than one, the product is smaller than the original number.
- When a number is multiplied by a value greater than one, the product is greater than the original number.

### Common misconception

Children may think that multiplication always makes things larger. Children may scale incorrectly.

When a number is multiplied by a value less than 1, the product is smaller than the original number - multiplication doesn't always make things larger. Compare numbers: if one factor is made ___ times the size, the product will be ___ times the size.

### Keywords

Product - The product is the result of two or more numbers multiplied together.

Factor - Factors are integers that are multiplied together to get a product.

### Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

## Video

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## Starter quiz

### 6 Questions

0.7

0.9

7

0.07

0.09

5

6

8

11

7

81

36

1

45

63

90

900

9,000

190

1,900

0.8

0.08

1.8

0.18

1.08

## Exit quiz

### 6 Questions

720

7,200

7.2

0

0.72

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