how to teach addition and subtraction with tens with song

Answer: Teach addition and subtraction with tens using call-and-response rhymes paired with number line hops: 'Hop up ten, say it loud / Twenty plus ten is thirty' for addition ( $+10$ ), and 'Slide back ten, take it slow / Fifty take ten is forty' for subtraction ( $-10$ ), keeping the ones digit constant.

Step-by-step solution

Step 1: Establish the Base Ten Concept

Start by reinforcing that the number $10$ represents a single bundle of $10$ ones. When adding or subtracting multiples of $10$ , only the tens place changes, while the units place remains $0$ .

Step 2: Teach the Addition Verse

Introduce the forward jump rhythm: 'Hop up ten, say it loud, count on up and make us proud! Twenty plus ten is thirty, thirty plus ten is forty!' This connects moving right on the number line with increasing the tens digit by $1$ .

Step 3: Teach the Subtraction Verse

Introduce the backward jump rhythm: 'Slide back ten, take it slow, count back down and watch it go! Fifty take ten is forty, forty take ten is thirty!' This connects moving left on the number line with decreasing the tens digit by $1$ .

Step 4: Practice Two-Digit Numbers

Extend the song to general two-digit numbers using the rule: 'The ones stay same, the tens will change, jumping by tens is not so strange!' For $34 + 10$ , only the tens digit increases from $3$ to $4$ , giving $44$ .

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