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Vocabulary
True or False
Open Number Sentences
Write the Open Number Sentence
100
What is a symbol used in place of a missing number?
A variable
100
50 + 25 = 70
False
100
37 + 24 = h
h = 61
100
The school library has 356 picture books and 527 chapter books. How many books does the library have in all?
356 + 527 = b
200
What is a number sentence containing an equal sign = called? Ex. 36 + 4 = 40
An equation
200
100 x 60 = 6,000
True
200
45 - 28 = n
n = 17
200
Last year there were 280 5th graders at school. This year there are 320 5th graders. How many more 5th graders are at school this year?
280 + k = 320
300
What type of number sentence contains a variable and is neither true nor false?
An open number sentence
300
30 + 45 > 100
False
300
36 + c = 52
c = 16
300
Mary bought 12 boxes of girl scout cookies. After she gave away some boxes she had 3 left. How many boxes did Mary give away?
12 - c = 3
400
What is a number sentence containing < or > called?
An inequality
400
15 - 4 + 5 = 16
True
400
11.5 - 9.3 = d
d = 2.2
400
Mr. Miller is 81 years old, and Mrs. Gilbraith is 36 years old. How much older is Mr. Miller than Mrs. Gilbraith?
81 - 36 = y