✖️ 3rd grade math · Multiply & Divide

Missing factor

? × 4 = 28 asks: how many 4s make 28? Count by 4s until you reach 28: that's 7 of them.

Worked example

? × 5 = 10

Answer: 2

Think: how many 5s make 10? Count by 5s: 5, 10. That's 2 of them, so the missing number is 2.

For grown-ups: Unknown factor; division as an unknown-factor problem. Below: three problems to try with the worked answers, and a free printable sheet. Children can practise the same skill as a game, with no sign-up and no ads.

CCSS 3.OA.A.4

What this practises, for teachers

Practices unknown factor; division as an unknown-factor problem (3.OA.A.4). A printable sheet with its answer key, worked answers on the page, no accounts.

▶ Practise it

For your class

🖨️ Printable sheet and key

On the board with this skill:

More printables, with answer keys, for this grade:

Try three

2 × ? = 4
Show the answer and how
Answer: 2
Think: how many 2s make 4? Count by 2s: 2, 4. That's 2 of them, so the missing number is 2.
? × 5 = 25
Show the answer and how
Answer: 5
Think: how many 5s make 25? Count by 5s: 5, 10, 15, 20, 25. That's 5 of them, so the missing number is 5.
7 × ? = 70
Show the answer and how
Answer: 10
Think: how many 7s make 70? Count by 7s: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70. That's 10 of them, so the missing number is 10.

Before and after

Learn first: Equal groups (3rd), Share and divide (3rd)

Comes next: Times table rules (3rd)

Name: ____________________Date: ____________Score: ____ / 12

Missing factor (3rd grade)

? × 3 = 9
? × 2 = 4
4 × ? = 20
? × 2 = 4
6 × ? = 12
28 ÷ ? = 4
? × 5 = 15
20 ÷ ? = 5
? ÷ 5 = 4
? × 9 = 54
? × 5 = 35
? × 6 = 36

Try three

Before and after

Missing factor (3rd grade)

Answer key