K-5 friendly lesson
One small step at a time.Read the idea, try the activity, and celebrate each win as you go.
Regroup tens and ones
Regrouping means trading 10 ones for 1 ten, or 1 ten for 10 ones.
Do this: Read the concept below, then try the quiz or activity.
Lesson 47 of 186
Concept
Base-ten rule: 10 ones = 1 ten
Examples: - 14 ones = 1 ten and 4 ones - 2 tens and 13 ones = 3 tens and 3 ones - 4 tens and 0 ones = 40
This helps in addition and subtraction with regrouping.
Try it
Regroup: 1. 16 ones = __ ten(s) and __ one(s) 2. 2 tens and 15 ones = __ tens and __ ones 3. 1 ten and 12 ones = __ tens and __ ones 4. 37 = __ tens and __ ones