BrightPath
One More at a Tens Boundary
Name:
Date:
Today I am practising: regrouping when adding or removing one
1
Draw 29 as tens and ones. Add one mark and regroup. What is the total?
2
Complete 49 + 1 = ___. State the new number of tens and ones.
3
Show how to remove one from 60. What number remains?
4
Compare the changes in 35 + 1 and 39 + 1.
5
Complete ___ + 1 = 80.
6
Explain why adding one to 69 changes both printed digits.
- Model exchanging a bundle when subtracting across a boundary.
- Encourage a drawing of all ones before regrouping.
- Contrast a boundary case with one that keeps the tens digit.