Multiplication by 4, step by step
The four times table is the two times table done twice.
The question
8 × 4
8×4
8 × 4=4 × 8
4 × 5=20
4 × 3=12
20+12=32
8×4=32
- 8 × 4 means 8 groups with 4 in each one — 8 rows of 4. The answer counts everything in all of them, not one row.
- Added up, that is 4 written 8 times — nobody wants to do that. Turn it round: 4 × 8 is the same amount, and it is only 4 lots of 8 to add instead.
- If 4 × 8 will not come, split the 8 at five: 4 × 5 = 20, and 4 × 3 = 12. Together that is 20 + 12 = 32.
- So 8 × 4 = 32.
How it works.
- 01
8 × 4 means 8 groups with 4 in each one — 8 rows of 4. The answer counts everything in all of them, not one row.
- 02
Added up, that is 4 written 8 times — nobody wants to do that. Turn it round: 4 × 8 is the same amount, and it is only 4 lots of 8 to add instead.
- 03
If 4 × 8 will not come, split the 8 at five: 4 × 5 = 20, and 4 × 3 = 12. Together that is 20 + 12 = 32.
- 04
So 8 × 4 = 32.