To add bigger numbers, count on from the larger one or use a ten. For 9 + 4, take 1 from the 4 to make 10, then add the 3 left over. The answer is 13.
Doubles help too. If you know 6 + 6 = 12, then 6 + 7 is just one more: 13. Pick the way that feels quickest for you.
Worked example
8 + 6 =
- 8 needs 2 to make 10, so split 6 into 2 and 4.
- 8 + 2 = 10, then 10 + 4 = 14.
Answer:14
Key words
- double
- a number added to itself, like 5 + 5
- near double
- a double plus one, like 5 + 6
- total
- how many altogether
Practise this
New questions every time.
Common Core-referenced: 1.OA.C.6