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Interactive video lesson plan for: Add and subtract 2-digit numbers without regrouping (1st grade math)

Activity overview:

In this 1st grade lesson, we add and subtract two-digit numbers WITHOUT regrouping (no carrying nor borrowing). First we do that with a help of a visual model, and then "in boxes", or by writing one number under the other, and then adding/subtracting the ones and the tens.

We also solve several word problems. The first one is challenging, but the visual model (boxes for tens and dots for ones) helps us to solve it easily.

Check out my other math videos for first grade at http://www.mathmammoth.com/videos/grade_1/1st-grade-math-videos.php

Tagged under: 1st grade,math,addition,subtraction,-digit addition,-digit subtraction,word problems,tens

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