McGraw Hill Math Grade 3 Chapter 3 Lesson 3 Answer Key Addition Patterns

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McGraw-Hill Math Grade 3 Answer Key Chapter 3 Lesson 3 Addition Patterns

Add

Look for the pattern. Add in your head. Write the sums.

Question 1.
5 + 9 = 14
10 + 9 = 19
15 + 9 = 24
20 + 9 = 29
Answer:
5 + 9 = 14.
10 + 9 = 19.
15 + 9 = 24.
20 + 9 = 29.

Question 2.
2 + 4 = ___
4 + 4 = ___
6 + 4 = ___
8 + 4 = ____
Answer:
2 + 4 = 6.
4 + 4 = 8.
6 + 4 = 10.
8 + 4 = 14.

Question 3.
8 + 6 = ___
18 + 6 = ___
28 + 6 = ___
38 + 6 = ___
Answer:
8 + 6 = 14.
18 + 6 = 24.
28 + 6 = 34.
38 + 6 = 44.

Question 4.
12 + 1 = ___
14 + 1 = ___
16 + 1 = ___
18 + 1 = ___
Answer:
12 + 1 = 13.
14 + 1 = 15.
16 + 1 = 17.
18 + 1 = 19.

Question 5.
10 + 3 = ___
20 + 3 = ___
30 + 3 = ___
40 + 3 = __
Answer:
10 + 3 = 13.
20 + 3 = 23.
30 + 3 = 33.
40 + 3 = 43.

Question 6.
15 + 7 = ___
20 + 7 = ___
25 + 7 =__
30 + 7 = ___
Answer:
15 + 7 = 22.
20 + 7 = 27.
25 + 7 = 33.
30 + 7 = 37.

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