Math: algebra

15/3

Prepare 15 cubes. Put them all in front of the baby. Say: let’s us do some division. We use division when we want to distribute things equally. Let’s count how many cubes are there. Point to each cube while counting: 1,2,3,…15. Say: There are 15 cubes. Show 15 fingers: first show 10 and then 5 again. Let’s us divide them by 3. It means we have to put 3 cubes in a row. You count with me: 1,2,3. Take the cubes one by one while counting and put them in one straight row. Stop when you reach 3. Show 3 fingers and say again 3! See we still have some cubes. Let us put them in another row beneath the first one. Remember we need to put only 3 cubes. Let’s count again! 1,2,3. Show 3 fingers. In the second row there are 3 cubes as well. Let us make three more rows until no more cubes will be left. Keep counting each cube. See there are no more cubes left. How many rows do we have now? 1, 2, 3, 4, 5. Five! Show five fingers. Now we solved a problem. 18 divided by 3 equals 5. Repeat the same with towers.

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