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Name
1-1
Equations may vary. Order of
1. Write two equations for each Math Mountain. addends in Math Mountains
may vary.
15
18
6
6
9
5
6+5=
18 - 9 =
6+
5+6=
9+
15 - 6 =
= 18
= 15
2. Draw a Math Mountain and write one more equation.
© Houghton Mifflin Harcourt Publishing Company
17
5
8
5 + 8=
=
UNIT 1 LESSON 1
12
17 - 8 =
5+8
7
8
8+
7+
= 17
=
12
12 - 7 =
Represent Addition and Subtraction
1