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Common Core: 1st Grade Math : Subtraction within 20 to Solve Word Problems

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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All Common Core: 1st Grade Math Resources

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Example Questions

Example Question #1392 : Common Core Math: Grade 1

Tim’s favorite tree had branches before the storm last night. He saw branches in the yard this morning. How many branches are left on the tree?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because the tree lost branches, so it will have less than what it started with.

We can start at and count back

13,12,11,10,9,8,7,6

$\frac{\begin{array}[b]{r}13\\ -\ 7\end{array}}{ \ \ \ \space 6}$

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Example Question #1393 : Common Core Math: Grade 1

Megan has markers. Ben only has markers so Megan lets Ben have of her markers. How many markers does Megan have left?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because Megan is giving some of her markers away, so she will have less than what she started with.

We can start at and count back .

12,11,10,9,8,7,6

$\frac{\begin{array}[b]{r}12\\ -\ 6\end{array}}{ \ \ \ \space 6}$

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Example Question #1 : Subtraction Within 20 To Solve Word Problems

The toy panda weighs pounds less than the toy truck. The truck weighs pounds, how much does the panda weigh?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because we are finding the difference in weight between the truck and the panda.

We can start at and count back .

19,18,17,16,15,14,13,12

$\frac{\begin{array}[b]{r}19\\ -\ 7\end{array}}{ \ \ \space 12}$

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Example Question #2 : Subtraction Within 20 To Solve Word Problems

Jess has t-shirts in her drawer. This week she has worn of her t-shirts. How many are left in the drawer?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because Jess has worn some of her shirts, so her total number of shirts in the drawer is decreasing.

We can start at and count back .

18,17,16,15,14,13,12,11

$\frac{\begin{array}[b]{r}18\\ -\ 7\end{array}}{ \ \ \ \space11}$

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Example Question #3 : Subtraction Within 20 To Solve Word Problems

Cassie picked flowers outside. She gave to her mom, and she wants to give the rest to her sister. How many does she have left for her sister?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because Cassie gave some of her flowers away, so she will have less than what she started with.

We can start at and count back .

14,13,12,11,10,9

$\frac{\begin{array}[b]{r}14\\ -\ 5\end{array}}{ \ \ \ \space 9}$

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Example Question #833 : Operations & Algebraic Thinking

Mark has coins in his pocket. When he gets them out, he drops all but of them. How many coins did he drop?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because Mark dropped some of his coins so he has less than what he started with.

We can start at and count back .

12,11,10,9,8

$\frac{\begin{array}[b]{r}12\\ -\ 4\end{array}}{ \ \ \ \space 8}$

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Example Question #834 : Operations & Algebraic Thinking

Toby has toys in his toy bin. At the end of the day, he has toys remaining in the bin. How many did he take out?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because Toby took toys out of the bin, so he is decreasing the number of toys in his bin.

We can start at and count back .

20,19,18,17

$\frac{\begin{array}[b]{r}20\\ -\ 3\end{array}}{ \ \ \space 17}$

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Example Question #332 : How To Subtract

Ally has pieces of her Halloween candy left. She decides to share pieces with her sister. How many pieces does she have left?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because Ally is giving some of her candy away, so she will have less than what she started with.

We can start at and count back .

15,14,13,12,11,10,9,8

$\frac{\begin{array}[b]{r}15\\ -\ 7\end{array}}{ \ \ \ \space 8}$

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Example Question #1401 : Common Core Math: Grade 1

David sees apples on the apple tree. If he picks of them, how many will be left?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because David is taking away apples.

We can start at and count back .

19,18,17,16,15,14

$\frac{\begin{array}[b]{r}19\\ -\ 5\end{array}}{ \ \ \space 14}$

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Example Question #1402 : Common Core Math: Grade 1

On Christmas Eve morning, a tree lot had trees left to sell. By the end of the day, they had only trees left. How many did they sell?

Possible Answers:

Correct answer:

Explanation:

This is a subtraction problem because the tree lot is getting rid of trees, so they have less by the end of the day.

We can start at and count back .

20,19,18,17

$\frac{\begin{array}[b]{r}20\\ -\ 3\end{array}}{ \ \ \space 17}$

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Common Core: 1st Grade Math : Subtraction within 20 to Solve Word Problems

Study concepts, example questions & explanations for Common Core: 1st Grade Math

All Common Core: 1st Grade Math Resources

Example Questions

Example Question #1392 : Common Core Math: Grade 1

Example Question #1393 : Common Core Math: Grade 1

Example Question #1 : Subtraction Within 20 To Solve Word Problems

Example Question #2 : Subtraction Within 20 To Solve Word Problems

Example Question #3 : Subtraction Within 20 To Solve Word Problems

Example Question #833 : Operations & Algebraic Thinking

Example Question #834 : Operations & Algebraic Thinking

Example Question #332 : How To Subtract

Example Question #1401 : Common Core Math: Grade 1

Example Question #1402 : Common Core Math: Grade 1

All Common Core: 1st Grade Math Resources

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