Subtraction With an Unknown

Which number sentences can represent this strip diagram

Select ALL the ones that could be right!!!!

• 42 - 16 = ?

• 16 + ? = 42

• 42 + 16 = ?

• ? + 16 = 42

Sarah had 25 pencils. John gave her some more pencils. Now Sarah has 43 pencils. How many pencils was she given?

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Which number sentences represent this question? Select ALL that correctly represent the problem.

Billy has 29 fewer pencils than Juan. If Billy has 64 pencils, how many pencils does Juan have?

**Draw a strip diagram to help you!!!**

• 64 - ? = 29

• 29 + 64 = ?

• 64 + 29 = ?

• 93

Erika's goal is to practice dribbling the soccer ball for 75 minutes this week.

*She practices 19 minutes on Monday.

Which number sentences represent this problem?

• 75 - 19 = ?

• 56

• 19 + ? = 75

• 75 + 19 = ?

Wanda traveled on an airplane twice last year for a total of 72 miles.

She traveled 49 miles in July.

How many miles did she travel in April?

• 121

• 23

• 37

• 111

Abigail has some money in her bank account. She adds $49 in the month of June. Now, she has $84. How much did she start with?

• 45

• 53

• 35

• 133

Annabelle and Harley wrote letters to their friends. Harley wrote ten more letters than Annabelle. Annabelle wrote 39 letters. How many letters did they write in all?

• 49

• 88

• 29

• 39

Greg found 58 eggs. Carlos found 39 less eggs. How many eggs did Carlos find?

• 19

• 21

• 29

• 97

Zane was supposed to practice his clarinet 2 times this week for 100 minutes. He practiced some on Tuesday and 47 minutes on Thursday. How many minutes did Zane practice on Tuesday?

• 63

• 67

• 100 + 47 = 147

• 100 - 47 = 53

Emery brought 41 pieces of candy home. Her dad and mom ate 27 pieces of candy. Emery was upset that she only had a bit of candy left. How many piece will Emery have to eat?

• 68

• 14

• 16

• 24