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In this lesson, we will learn how to model addition situations up to 100 with bar models or part-part-whole diagrams.

Q1:

Karim and Engy were building houses out of blocks. Karim used 36 blocks. Engy used 51 blocks. How many blocks did they use?

Will the answer be bigger or smaller than the numbers in the question?

Do you need to add or subtract to find the answer?

Find out how many blocks they used.

Q2:

Shady and Sameh were both playing a video game. At the beginning of the day, Shady was at level 36 and Sameh was at level 26. During the day, Shady moved up 16 levels and Sameh moved up 12 levels. Find the equation that shows the level Shady reached.

Q3:

A man bought rice for 9 LE and milk for 19 LE. He had 44 LE. How much does he have left?

Q4:

Sarah is trying to solve this word problem:

There were 41 birds in a tree. 15 of them flew away. How many birds are in the tree now? Sarah said the answer was . What did she do wrong? What is the correct answer?

Q5:

Ramy is trying to solve this word problem:

There were 37 fish in a pool at the bottom of a waterfall. 12 fish swam down the waterfall into the pool. How many fish are in the pool now?

Ramy said the answer was 3 7 − 1 2 = 2 5 . What did he do wrong? What is the correct answer?

Q6:

Amir has 62 blocks to build with. He used 29 blocks to build one house. He wants to build a second house with the leftover blocks.

Is the number of leftover blocks bigger or smaller than 62?

Do you need to add or subtact to find how many blocks he has left to build the second house?

How many blocks are left to build the second house?

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