Free preview Add and subtract within 20

Add using arrays

▶ Adding with arrays

Sal shows how to relate repeated addition to an array.

⏱ 1:54 💾 2.3 MB License: cc-by-nc-sa Streaming via CDN

Sal uses addition to solve array word problems.

⏱ 1:41 💾 2.2 MB License: cc-by-nc-sa Streaming via CDN

Sal solves word problems by adding the same number many times.

⏱ 2:09 💾 9.2 MB License: cc-by-nc-sa Streaming via CDN

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