PLACE VALUE ADDITION

Add tens and ones separately using expanded form and column addition.

L3L4

CS.N.2.1·Recognizing natural numbers 0–1000(II)CS.N.2.3·Performing addition and subtraction 0–1000(II)

Section 1 / 3

UNDERSTANDING PLACE VALUE

In larger numbers, each digit has a place value: ones, tens, hundreds. When adding multi-digit numbers, we can add each place separately. This is called partial sums or expanded form addition.

10

3

1

4

34 + 25

1Tens: 30 + 20 = 50

2Ones: 4 + 5 = 9

350 + 9 = 59

= 59

LEADER TIP

Use base-ten blocks to make regrouping concrete before moving to the written algorithm.

BEFORE THIS LESSON, TRY

Making Ten

PRACTICE WITH THESE GAMES

Addition Quiz

Missing Number Sprint

Calc Cascade

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CONTINUE WITH:

Addition Word Problems

Addition Estimation

PLACE VALUE ADDITION

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PLACE VALUE ADDITION