Add Three or Four Numbers

Add up to four two-digit numbers, looking for easy pairs first.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 28

You can add more than two numbers! Let's add 16 plus 13 plus 24.
Look for an easy pair first. 16 and 24: 6 ones and 4 ones make a ten! 16 plus 24 is 40.
Then add the last one: 40 plus 13 is 53.
Order doesn't matter when you add, so pick the easiest order!
Another way: add all the tens, then all the ones. 21 plus 32 plus 15 plus 12. The tens make 70. The ones make 10. 70 plus 10 is 80.

Georgia's K-12 Mathematics Standards:

2.NR.2.4 — Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.