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Name
4-1
1. Write two equations for each Math Mountain. Equations may vary.
15
7
13
9
4
7+4=
15 - 9 =
4+7=
9+
=
8
8+
15
=
13
13 - 8 =
Add.
60 = 100
4 + 6 = 10
2. 40 +
50 + 30 = 80
5+3= 8
10 + 40 = 50
1+4= 5
3. Draw a line segment 6 cm long.
Mark and count 1-cm lengths to check the length.
© Houghton Mifflin Harcourt Publishing Company
4. Stretch Your Thinking Elliot counts a group of coins
starting with the quarters. His sister counts the same
coins. She starts counting the pennies. Will they get
the same amount? Explain.
Yes; the amount does not change, but it is usually
easier to begin counting coins with the greatest value.
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UNIT 4 LESSON 1
Explore Quarters