Grade 1 Math Practice Test: Adding Three Numbers
- Adding Three Numbers
- 10 questions
- 12 minutes
When you add three numbers, you can add any two first. Look for two numbers that make 10, then add the third.
Tap an option to mark your answer. You can change your mind, or tap the same option again to leave the question blank. The correct answers and explanations appear when you finish the test.Tap an option to answer; tap it again to leave the question blank.
Your result
- 0 correct
- 0 wrong
- 0 blank
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Question 1
What is 3 + 7 + 4?
Correct answer: D
3 + 7 makes 10 first, then 10 + 4 = 14. The answer 10 forgets to add the 4.
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Question 2
Pia wants to add 6 + 5 + 4 by making a ten first. Which two numbers should she add first?
Correct answer: A
6 + 4 = 10, then 10 + 5 = 15. Adding 6 and 5 first gives 11, which does not make a ten.
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Question 3
What is 2 + 8 + 9?
Correct answer: C
2 + 8 = 10, and 10 + 9 = 19. The answer 10 stops after the first two numbers.
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Question 4
Which has the same sum as 5 + 9?
Correct answer: B
Adding in a different order gives the same sum: both are 14. The problem 9 − 5 subtracts, so it gives 4.
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Question 5
Ava picks 4 red flowers, 3 yellow flowers and 6 white flowers. How many flowers does she pick in all?
Correct answer: C
Add all three groups: 4 + 6 = 10, then 10 + 3 = 13. The answer 7 adds only the red and yellow flowers.
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Question 6
What is 7 + 0 + 8?
Correct answer: A
Adding 0 does not change a number, so this is 7 + 8 = 15. The answer 8 forgets the 7.
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Question 7
Ben adds 5 + 2 + 5. He adds 5 + 5 first. What does he add next?
Correct answer: D
5 + 5 = 10, and the number still left is 2, so he adds 10 + 2 = 12. Using 10 + 5 counts one 5 twice.
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Question 8
Which number sentence is true?
Correct answer: B
4 + 6 makes 10, and the 3 stays, so both sides are 13. The side 4 + 10 is 14, which is one too many.
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Question 9
What is 1 + 9 + 9?
Correct answer: D
1 + 9 = 10, then 10 + 9 = 19. The answer 18 is only 9 + 9.
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Question 10
A box has 8 pencils, 2 pens and 3 erasers. How many things are in the box?
Correct answer: A
8 + 2 = 10, and 10 + 3 = 13. The answer 10 leaves out the erasers.
Questions you leave blank are not counted as wrong.
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