Jumps of 10 and 100

245 + 130 as jumps on a number line.

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

What children learn in Level 52

Big numbers, big jumps! To add 130 to 245, break 130 into 1 hundred and 3 tens.
Your turn! Start at 245. Tap to jump 100, then 10, 10, and 10.
245, 345, 355, 365, 375. So 245 plus 130 is 375!
Jumping back works for taking away. 568 minus 120: jump back 100, then back 10 and 10.
You can make the jumps bigger, too: plus 100, then plus 30. Same answer!

Georgia's K-12 Mathematics Standards:

2.NR.2.2 — Find 10 more or 10 less than a given three-digit number and find 100 more or 100 less than a given three-digit number.
2.MDR.5.5 — Represent whole-number sums and differences within a standard unit of measurement on a number line diagram.