Using Doubles And Halving Timetables.

Use this working out to show the answers for the other beads

1.

There are 5 beads in each row.

5+5=10

2 groups of 5 is 10

2x5=10

There are 7 beads in each row.

8+8=16

2 groups of 8=16

2x8=16

Example: 5 + 5 is the same as 2 x 5= 10

1. 6 + 6 is the same as 2 x 6=12
2. 7+7 is the same as 2 x 7=14
3. 7+7 is the same as 2 x 7=14
4. 8+8 is the same as 2 x 8=16
5. 9+9 is the same as 2 x 9=18
6. 10 is the same as 2 x 10=20

Example: If 2 x 3= 6 then 4 x 3= 12

1. If 2 x 4=8 then 4 x 4=16
2. If 25 x 2=50 then 25 x 4=100
3. If 2 x 40=80 then 4 x 40=160
4. If 2 x 7=14 then 2 x 7=14