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PLACE VALUE ADDITION

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

L3L4
CS.N.2.1(II)CS.N.2.3(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.

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

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