Rounding
to the nearest hundred
to the nearest hundred
550
600
90
56 + 38
56 is about 60
38 is about 40
60 + 40 = 100
56 - 38
56 is about 60
38 is about 40
60 - 40 = 20
Bob collects sports cards. His mom gave him almost 50 hockey cards. His dad gave him 40 baseball cards. Grandpa gave him about 70 football cards. (Which words let you know that the hockey cards and football cards were just estimates?)
almost 50 hockey cards
about 70 football cards
638
600
565
570
274 + 103
274 is about 300
103 is about 100
300 + 100 = 400
274 - 103
274 is about 300
103 is about 100
300 - 100 = 200
Jackson wants to buy a toy car that costs $5.19 and a paint set that costs $4.69. About how much money does Jackson need to buy these items?
About $10.00
744
700
1,947
1,950
777 + 222
777 is about 800
222 is about 200
800 + 200 = 1,000
798 - 105
798 is about 800
105 is about 100
800 - 100 = 700
Sophia spent 17 minutes washing the dishes. She spent 38 minutes cleaning her room. Did Sophia finish her chores in less than an hour? (Answer yes or no.)
1 hour = 60 minutes
17 minutes is almost 20 38 minutes is almost 40 20 + 40 = 60 minutes or 1 hour; YES she finished in under an hour.
1,266
1,300
3,628
3,630
311 + 298
311 is about 300
298 is about 300
300 + 300 = 600
311 - 129
311 is about 300
129 is about 100
300 - 100 = 200
Sophia baked 24 muffins. She kept 3 for herself, then shared the rest equally between 2 of her friends. She estimated that each friend would get about 10 muffins. Was this a good estimate?
Yes!
24 -3 =21
21 rounded to the nearest ten = 20
10 for each of her two friends.
7,488
7,500
5,034
5,030
1,884 + 587
1,884 is about 2,000
587 is about 600
2,000 + 600 = 2,600
1,004 - 197
1,004 is about 1,000
197 is about 200
1,000 - 200 = 800
(Answer yes or no.)
1,000 pennies would have a value of more than one dollar
If 100 pennies = $1.00 Then, YES, 1,000 pennies would be more than $1.00
BONUS: How many dollars would 1,000 pennies be?