Addition Subtraction Rounding to 10 Rounding to 100 Word Problems
100
What is 52 + 34
86
100
What is 52 - 34
18
100
Round to the nearest 10

54
50
100
Round to the nearest 100

54
100
100
Steve's father is 52 years old. His uncle, Greg, is 68 years old. Steve said his uncle is about 40 years older than his father.

Is he correct?
No

52 rounds to --> 50
68 rounds to --> 70

50 and 70 are only 20 years difference, not 40.
200
What is 126 + 42
168
200
What is 126 - 42
84
200
Round to the nearest 10

123
120
200
Round to the nearest 100

324
300
200
Becky has a secret number. To the nearest ten AND the nearest hundred, her number rounds to 400. Which could be Becky's secret number?

a. 287
b. 392
c. 409
d. 402
d. 402

to the nearest 10-->400
to the nearest 100--> 400
300
What is 437 + 349
786
300
What is 437 - 349
88
300
Round to the nearest 10

967
970
300
Round to the nearest 100

967
1000
300
Bob's father is 82 years old. His uncle, Greg, is 54 years old. Bob said his uncle is about 30 years younger than his father.

Is he correct?
Yes.

82 rounds to --> 80
54 rounds to ---> 50

The difference between 80 and 50 is 30.
400
What is 500 + 323
823
400
What is 500 - 323
177
400
Round to the nearest 10

3 tens and 8 ones
40
400
Becky has a secret number. To the nearest ten AND the nearest hundred, her number rounds to 1000. Which could be Becky's secret number?

a. 991
b. 995
c. 1007
d. 1005
b. 995

to the nearest 10--> 1000
to the nearest 100--> 1000
500
What is 399 + 254
653
500
What is 399 - 254
145
500
Round to the nearest 10

100 + 80 + 9
190
500
Round to the nearest 100

100 + 80 + 9
200
500
Tyler says 834 rounds to 800 and Sarah says 834 rounds to 830.

Who is correct?
Both.

When rounding to the nearest hundred --> 800
When rounding to the nearest ten ----> 830






Math Unit 1 Test

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