Grade Three Indicators For The 2003 Mathematics Standard Course Of Study Page 31
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34Vocabulary
5.03 Use symbols to represent unknown
and
quantities in number sentences.
Resources
To achieve this objective, students should be able to:
•
Compose and decompose numbers.
•
Use a variety of strategies to find unknown quantities.
❉
❉
A.
+ 900 + 40 + 3 = 7,943
is equal to _____.
3 x C = 21 C = ______.
B.
Ashley is at the fall festival. She has earned 70 point for
knocking down bottles. The red bottles are worth 5
points and the blue bottles are worth 7 points.
• Write a number sentence using a symbol to represent
the total number of bottles she knocks down.
• Write a number sentence using a symbol if she only
knocks blue bottles.
C.
Jake used the chart below to record temperatures on
Monday. If the temperature continues to change in this
pattern write a number sentence that represents the
outside temperature at 4:30 pm. What number sentence
would represent the inside temperature?
Time
1:30 pm 2:30 pm
3:30 pm 4:30 pm 5:30 pm
Inside
72° F
69° F
66° F
60° F
Temp
Outside
67° F
63° F
60° F
57° F
Temp
Grade Three: Algebra
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