We can use the multiplication facts we know to help find new facts.
There are 2 fours in every eight.
1
× 1 2 3 4 5 6 7 8
1 × 8 = 8
1×4=4 1
2 × 8 = 16
2×4=8 2
3 × 8 = 24
3×4=12 3
4 × 8 = 32
4×4=16 4
5 × 8 = 40
5×4=20 5
There are twice as many counters in 1 row of 8 than in 1 row of 4. So, 1 × 8 is double 1 × 4
There are 3 threes in every nine.
2
×123456789
1 × 9 = 9
1×3=3 1
2 × 9 = 18
2×3=6 2
3 × 9 = 27
3×3=9 3
4 × 9 = 36
4×3=12 4
5 × 9 = 45
5×3=15 5
There are three times as many counters in 1 row of 9 than in 1 row of 3. So, 1 × 9 is triple 1 × 3
64
9781380050694__text.indb 64
04/05/2022 15:50
Made with FlippingBook Learn more on our blog