Multiplication by 7, step by step
The sevens have the reputation of being the hardest table.
The question
8 × 7
8×7
8 × 7=7 × 8
7 × 5=35
7 × 3=21
35+21=56
8×7=56
- 8 × 7 means 8 groups with 7 in each one — 8 rows of 7. The answer counts everything in all of them, not one row.
- Added up, that is 7 written 8 times — nobody wants to do that. Turn it round: 7 × 8 is the same amount, and it is only 7 lots of 8 to add instead.
- If 7 × 8 will not come, split the 8 at five: 7 × 5 = 35, and 7 × 3 = 21. Together that is 35 + 21 = 56.
- So 8 × 7 = 56.
How it works.
- 01
8 × 7 means 8 groups with 7 in each one — 8 rows of 7. The answer counts everything in all of them, not one row.
- 02
Added up, that is 7 written 8 times — nobody wants to do that. Turn it round: 7 × 8 is the same amount, and it is only 7 lots of 8 to add instead.
- 03
If 7 × 8 will not come, split the 8 at five: 7 × 5 = 35, and 7 × 3 = 21. Together that is 35 + 21 = 56.
- 04
So 8 × 7 = 56.