# Texas Go Math Grade 1 Lesson 13.1 Answer Key Record Related Facts

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## Texas Go Math Grade 1 Lesson 13.1 Answer Key Record Related Facts

Explore

Listen to the problem. Model with . Draw . Write the number sentence.
________ + _________ = __________
________ – _________ = __________

FOR THE TEACHER • Read the following problem for the left box. Colin has 7 crackers. He sets 1 more cracker. How many crackers does Colin have now? Then read the following for the right box. Colin has 8 crackers. He gives one to Jacob. How many crackers does Colin have now?

Math Talk
Mathematical Processes

Explain how your model helps you write your number sentence.

Model and Draw

How can one model help you write four related facts? Share and Show

Use . Add or subtract. Complete the related facts.

Question 1.
8 + _________ = 15
7 + 8 = _________

15 – 7 = __________
_________ – _________ = __________
8 + 7 = 15
7 + 8 = 15
15 – 7 = 8
15 – 8 = 7

Question 2.
________ + 9 = 14
9 + 5 = ___________

14 – __________ = 5
_________ – _________ = __________
5 + 9 = 14
9 + 5 = 14
14 – 9 = 5
14 – 5 = 9

Question 3.
7 + _________ = 13
6 + 7 = ____________

13 – 6 = __________
_________ – _________ = __________
7 + 6 = 13
6 + 7 = 13
13 – 6 = 7
13 – 7 = 6

Problem Solving

Use . Add or subtract. Complete the related facts.

Question 4.
________ + 8 = 13
8 + 5 = ____________

13 – __________ = 5
_________ – _________ = __________
5 + 8 = 13
8 + 5 = 13
13 – 8 = 5
13 – 5 = 8

Question 5.
H.O.T. Circle the number sentence that has a mistake. Correct it to complete the related facts. 7 + 9 = 16
16 + 9 = 7

9 + 7 = 16
16 – 7 = 9 Question 6.
H.O.T. Multi-Step Choose three numbers to make related facts. Choose numbers between 0 and 18. Write your numbers. Write the related facts. Choose the correct answer.

Question 7.
Use to count.
Aunt Kay makes 6 instruments. Matt and Karen give her 3 more. Which completes the related facts?
6 + 3 = 9
3 + 6 = 9

9 – 6 = 3
___________
(A) 9 + 3 = 12
(B) 9 – 3 = 6
(C) 6 + 6 = 12
Answer:: The correct answer is option – B
9 – 3 = 6

Question 8.
Analyze Pete has 13 pencils. One day he uses 8 pencils. Another day he uses the rest. Which completes the related facts?
13 – __________ = 8
________ + 8 = 13

13 – 8 = __________
8 + __________ = 13
(A) 6
(B) 8
(C) 5
Given that
The total number of pencils near pete = 13
one day he use pencils = 8
pencils used in another day =13 – 8 = 5
The correct answer is option – C
13 – 5 = 8
5 + 8 = 13
13 – 8 = 5

Question 9.
Texas Test Prep Which completes the related facts?
9 + 8 = 17
8 + 9 = 17

17 – 8 = 9
__________
(A) 9 + 9 = 18
(B) 9 – 6 = 3
(C) 17 – 9 = 8
The correct answer is option – C
9 + 8 = 17
8 + 9 = 17
17 – 8 = 9
17 – 9 = 8

TAKE HOME ACTIVITY • Write an addition fact. Ask your child to write three other related facts.

### Texas Go Math Grade 1 Lesson 13.1 Homework and Practice Answer Key

Add or subtract. Color to help you. Complete the related facts. Question 1.
_______ + 5 = 11
5 + 6 = ________

11 – _________ = 6
__________ – __________ = __________
6 + 5 = 11
5 + 6 = 11
11 – 5 = 6
11 – 6 = 5

Problem Solving

Circle the number sentence that has a mistake. Correct it to complete the related facts.

Question 2.
6 + 8 = 14
14 – 6 = 8

8 – 6 = 14
14 – 8 = 6 Lesson Check

Choose the correct answer.

Question 3.
Which completes the related facts?
8 + 4 = 12
4 + 8 = 12

12 – 8 = 4
__________
(A) 12 + 4 = 14
(B) 12 – 4 = 8
(C) 4 + 4 = 8
12 – 4 = 8 is the related fact.
Option B is the correct answer.

Question 4.
Which completes the related facts?
15 – 7 = __________
7 + __________ = 15

15 – ________ = 7
________ + 7 = 15
(A) 8
(B) 9
(C) 7 