Stage 3 · Times tables
×3 and ×4
×4 is double, then double again.
How to do it
Method
×4 is double, then double again
7 × 4 = 7 × 2 × 2 = 14 × 2 = 28
Another way
Learn the table
7 × 3 = 21, 7 × 4 = 21 + 7 = 28
In full
×4 is double-double: 7×4 → 7×2=14 → 28. ×3 is double-then-add-one-more: 7×3 → 14 + 7 = 21. Forgotten a fact? Rebuild it with these on the spot. Repeated addition or learning the table by heart works too; the answers are the same.
Worked examples
Have a go first, then open each one for the answer and the working.
Example 1
3 × 2
Show the answer and working
Answer: 3 × 2 = 6
3 × 2: ×3 is a double and one more, 2 × 2 = 4, 4 + 2 = 6
Example 2
3 × 6
Show the answer and working
Answer: 3 × 6 = 18
3 × 6: ×3 is a double and one more, 6 × 2 = 12, 12 + 6 = 18
Example 3
5 × 3
Show the answer and working
Answer: 5 × 3 = 15
5 × 3: ×3 is a double and one more, 5 × 2 = 10, 10 + 5 = 15
Example 4
4 × 11
Show the answer and working
Answer: 4 × 11 = 44
4 × 11: ×4 is double, then double again, 11 × 2 = 22, 22 × 2 = 44
Practise ×3 and ×4 in the game →Stage 3 · Times tables · Free to start, unlimited questions, no download