Using the inverse operation to find missing numbers
Using the inverse operation to find missing numbers
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Lesson details
Key learning points
- In this lesson, we will use our knowledge of multiplication and division 'fact families' in order to find the missing number in a range of questions. We will use arrays to represent the relationship between inverse operations, and explore how fact families around multiplication and division help us discover new facts about multiplication and division.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
The inverse of multiplication is...
addition
subtraction
Q2.
Knowing your times tables can help to solve division calculations
false
Q3.
The inverse of 3 x 4 = is
3 x 3 =
4 x 3
4 x 4
Q4.
Which multiplication fact will help you solve this division calculation? 18 ÷ 6 =
18 ÷ 2 = 9
6 ÷ 2 = 3
6 x 6 =36
Q5.
I have 30 sweets to share with my friends. I have 5 friends. How many sweets will each of them get?
30
35
5
5 Questions
Q1.
The inverse of division is
addition
subtraction
Q2.
If you know that 3 x 6 = 18 this can help solve
18 ÷ 2 =
18 x 2 =
6 ÷ 3 =
Q3.
Which number is missing from this this fact family 21, 7 and ....?
1
2
9
Q4.
What fact family could this bead string represent?
3 x 2 = 6
3 x 3 = 9
3 x 8 = 24
Q5.
This array shows 3 x 5 = 15 and ...
10 ÷ 2 = 5
3 ÷ 3 = 1
5 + 3 = 8