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In this lesson, we will learn how to use bar models to represent and solve additive comparison problems with numbers to 100.

Q1:

Samar scored 41 points in a sports competition. Mariam scored 28 points more than Samar.

We want to find out how many points Mariam scored. We can use a part-part-whole diagram to model this problem.

Is Mariam’s score the whole or the other part?

How many points did Mariam score?

Q2:

Three friends were seeing who could build the tallest tower out of blocks.

Karim’s tower was 37 inches high. Nada’s tower was 6 inches shorter than Karim’s. Sherif built a tower that measured 3 inches less than Nada’s.

How many inches tall was Sherif’s tower?

Q3:

Select the problem that can be solved by the addition equation 2 6 + 1 2 = 3 8 .

Q4:

Select the word problem that can be solved using this part-part-whole diagram.

Q5:

Select the word problem whose answer is 3 3 + 1 8 = 4 1 .

Q6:

In the second grade at a school, 41 students have hot lunches. The number of students who have packed lunches is 8 more than the number who have hot lunches.

How many students have packed lunches?

How many students are there in the second grade?

Q7:

Yasmine took 9 photos, and Yara took 2 photos. How many more photos did Yasmine take than Yara?

Q8:

Amir, Adel, and Engy were playing a game.

Amir scored 52 points. Adel scored 21 more points than Amir. Engy scored 9 points fewer than Adel. How many points did Engy score?

Q9:

In a garden, there are 53 roses. There are 19 fewer daffodils than roses.

How many daffodils are there?

How many flowers are in the garden?

Q10:

Nada and Mariam were taking photos for an art project. Nada took 11 fewer photos than Mariam. Mariam took 50 photos.

How many photos did Nada take?

How many photos did the girls take altogether?

Q11:

Q12:

Questions which tell you how much more (or less) one amount is compared to another are additive comparison problems.

Which of the following is an additive comparison problem?

Q13:

Bassem started training to join the basketball team. In the first week, he scored a total of 23 baskets. In the second week, he scored 12 more baskets than in the first week.

Should I add or multiply to find the number of baskets he scored in the second week?

Why?

Q14:

Nada scored 72 points in a sports competition. Nabil scored 19 fewer points than Nada.

We want to find out how many points Nabil scored. We can use a part-part-whole diagram to model this problem.

Is Nabil’s score the whole or the other part?

How many points did Nabil score?

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