Grade 1 Math Practice Test: Making Ten and Doubles
- Making Ten and Doubles
- 10 questions
- 12 minutes
Two smart tricks make adding faster: build a 10 first, or start from a double you already know. Try both on each problem.
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.
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Question 1
What is 7 + 7?
Correct answer: B
7 + 7 is a double: two groups of 7 make 14. If you know this double, 7 + 8 is just one more.
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Question 2
Nina wants to solve 6 + 7 with a double she already knows. Which double helps her most?
Correct answer: D
6 + 6 = 12, and 7 is one more than 6, so 6 + 7 = 13. The fact 5 + 5 is a double too, but it is further away.
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Question 3
Omar knows that 8 + 8 = 16. What is 8 + 9?
Correct answer: A
9 is one more than 8, so the sum is one more than 16: 8 + 9 = 17. The answer 18 is 9 + 9.
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Question 4
Ken solves 9 + 5 by making a ten. He breaks the 5 into two parts. Which two parts help him make 10 with the 9?
Correct answer: C
9 needs 1 more to make 10, so Ken uses 1 first and has 4 left: 10 + 4 = 14. Breaking 5 into 2 and 3 does not give the 9 exactly 1.
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Question 5
Which shows making a ten to solve 8 + 6?
Correct answer: D
8 + 2 makes 10, and the 4 left from the 6 gives 10 + 4 = 14. In 8 + 1 + 5, the first step is only 9, not 10.
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Question 6
Which two numbers make 10?
Correct answer: A
3 + 7 = 10. The pair 2 and 9 makes 11, and 4 and 5 makes 9.
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Question 7
Jo thinks of 5 + 5 + 1 to find a sum. Which problem is Jo solving?
Correct answer: B
5 + 6 is the double 5 + 5 plus one more, so both equal 11. The problem 6 + 6 would be 5 + 5 + 2.
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Question 8
What number do you add to 6 to make 10?
Correct answer: C
6 + 4 = 10. The answer 16 adds 6 and 10, but 10 is the total we want to reach.
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Question 9
Lucy has 9 red beads and 4 blue beads. She moves 1 blue bead over to the red beads to make a ten. Which problem does she solve now?
Correct answer: A
The red beads become 10, and 4 − 1 = 3 blue beads are left, so 10 + 3 = 13. Writing 10 + 4 forgets that one blue bead moved.
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Question 10
Tom has 9 shells. Ana has the same number of shells. How many shells do they have in all?
Correct answer: C
The same number twice is a double: 9 + 9 = 18. The answer 9 counts only one child's shells.
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