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Name
1-8
Add.
1.
4
+
_9
13
8
+
_8
16
9
+
_8
17
7
+
_2
9
8
+
_9
17
11
_3
8
16
_7
9
9
_6
3
14
8
_8
_8
6
0
Equations may vary. Order
5
+
_9
14
Subtract.
2.
15
_8
7
3. Draw a Math Mountain and write one more equation. of addends in Math
Mountains may vary.
5
6
9
8
7
4
9+7=
8+4=
6+5=
7+9=
=
8+4
Complete the addition doubles equation.
4.
9
+
9
=
18
5.
6
+
6
=
12
6. Stretch Your Thinking Suppose you cannot remember the
answer to 15 - 8 =
. What could you do to solve?
Sample answers: I could draw a picture. I could think of the related
addition sentence 8 +
16
UNIT 1 LESSON 8
= 15.
Equations, Equation Chains, and Vertical Form
© Houghton Mifflin Harcourt Publishing Company
5+6=