3.1 Addition of Three Whole Numbers

Jordan brought a box of donuts for the class. The box had 8 chocolate, 6 sprinkles, and 4 glazed donuts. How many donuts were in the box all together?

• ______ = 8 + 4 + 6

• ______ = 8 + 4 + 4

• ______ = 8 + 9

• 4 + 7 + 8 = _______

Tim added up his stickers using the equation below.

3 + 2 + 6 = 11

Which model represents Tim’s stickers?

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• 
• 
• 

Choose the equation that correctly represents the model below.

• 7 + 6 + 8 =18

• 7 + 3 + 6 =18

• 7 + 4 + 7 =18

• 9 + 6 + 8 =18

Complete the equation below by choosing the missing addend.

14 + ? + 1 = 19

• 15

• 4

• 19

• 9

Nine (9) frogs hop on a log in the morning. Then, 7 frogs hop on at noon and 1 more in the evening.

How many frogs are on the log now?

• 18

• 17

• 16

• 12

Sofia collected leaves for the class during recess. Sofia found 9 red leaves, 5 orange leaves

and 5 brown leaves.

Which number line shows the total leaves Sofia collect?

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• 
• 
• 

The school bus picks up 8 students at the first bus stop, 5 students at the second stop, and

some more students on the last stop. 20 students are on the bus now. How many students

were picked up at the last stop?

8 + 5 + ? = 20

• 8 students

• 7 students

• 5 students

• 13 students

Select the correct equation to match the word problem.

For dinner I ate 5 carrots, 3 potatoes, and 7 green beans. How many vegetables did I eat in all?

• 17 + 3 = 20

• 6 + 7 + 6 = 19

• 5 + 10 = 15

Select the correct equation to match the word problem.

Pedro has 5 green markers, 12 purple markers and 3 black markers. How many markers does

Pedro have?

• 17 + 3 = 20

• 6 + 7 + 6 = 19

• 5 + 10 = 15

Select the correct equation to match the word problem.

Kelly has 6 orange shirts, 7 yellow shirts and 6 blue shirts. How many shirts does Kelly have?

• 17 + 3 = 20

• 6 + 7 + 6 = 19

• 5 + 10 = 15