Doubles
What is 4 + 4?
8
Solve 7 + 8 using a near-doubles strategy. (Hint: use 8 + 8 then subtract 1.)
15
Add 7 + 5.
12
20 - 6
14
What is 6 + 6?
12
Solve 3 + 4 using a near-doubles strategy. (Hint: use 3 + 3 then add 1.)
7
Add 9 + 8
17
15 - 7
8
What is 8 + 8?
16
Solve 9 + 10 using a near-doubles strategy. (Hint: use 10 + 10 then subtract 1.)
19
Add 11 + 9
20
18 - 2
16
9+9
18
Solve 11 + 12 using a near-doubles strategy. (Hint: use 12 + 12 then subtract 1.)
23
12+14
26
20-11
9