Addition | Subtraction | Rounding to 10 | Rounding to 100 | Word Problems |
---|---|---|---|---|
What is 52 + 34
86
|
What is 52 - 34
18
|
Round to the nearest 10
54
50
|
Round to the nearest 100
54
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. |
What is 126 + 42
168
|
What is 126 - 42
84
|
Round to the nearest 10
123
120
|
Round to the nearest 100
324
300
|
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 |
What is 437 + 349
786
|
What is 437 - 349
88
|
Round to the nearest 10
967
970
|
Round to the nearest 100
967
1000
|
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. |
What is 500 + 323
823
|
What is 500 - 323
177
|
Round to the nearest 10
3 tens and 8 ones
40
|
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 |
|
What is 399 + 254
653
|
What is 399 - 254
145
|
Round to the nearest 10
100 + 80 + 9
190
|
Round to the nearest 100
100 + 80 + 9
200
|
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 |