Rounding
Standard Form
Expanded Form
+/-
Bonus
100
17 Rounded to the nearest ten
20
100
Eight written in standard form
8
100
Twenty-five written in expanded form
20 + 5
100
On Friday, Mrs. DeHorn read 36 pages and Ms. Geddes read 12. How many pages did Mrs. DeHorn and Ms. Geddes read on Friday?
36 + 12 = 48
100
Ms. Geddes is solving 32 + 16 using partial sums. To find the partial sum of the ones, which numbers would he add?
2 and 6
200
944 rounded to the nearest ten.
940
200
Twenty-five written in standard form
25
200
Eight hundred, fourty-three written in expanded form
800 + 40 + 3
200
Mr. Johnson's class is reading a book with 355 pages. They have already read 32 pages. How many pages are left to read?
355 - 32 = 323
200
Molly is finding the difference between 168 and 132 using partial sums. To find the partial sum of the tens, which numbers would she use?
60 and 30
300
326 rounded to the nearest hundred
300
300
Eight hundred, fourty-three written in standard form
843
300
Three hundred and sixteen written in expanded form
300 + 10 + 6
300
Culver's has 35 pounds of cheese and 25 pounds of potatoes. On Monday, Culver's used up 13 pounds of cheese and potatoes. How many pounds of cheese and potatoes are left for the rest of the week?
35 pounds + 25 pounds - 13 pounds = 47 pounds
300
Kenny has 12 bottles of coke to put onto two shelves at the grocery store. Help Kenny by letting him know if each arrangement is possible with an even number of bottles to put on the shelves:
1. Shelf A: odd number ---- Shelf B: even number
2. Shelf A: even number ---- Shelf B: even number
3. Shelf A: odd number ---- Shelf B: odd number
1. No
2. Yes
3. Yes
400
Peter's motorcycle needs $1,365 worth of repairs. His mechanic says that amount is about $1400 in repairs. Which best describes how the mechanic came up with the estimate?
A) They rounded to the nearest one.
B) They reounded to the nearest ten.
C) They rounded to the nearest hundred.
D) They rounded to the nearest thousand.
C) They rounded to the nearest hundred.
400
Three thousand, nine hundred sixty-two written in standard form
3962
400
Three thousand, nine hundred sixty-two written in expanded form
3,000 + 900 + 60 + 2
400
Use the bar diagram to help you find the unknown number in TWO ways:
393 + _____ = 632 632 - _____ = 393
393 + 239 = 632 632 - 239 = 393
400
The 3rd graders in Mrs. DeHorn's class colored 224 pictures. They gave 119 of those pictures away to the other third grade classrooms. Then they colored 306 pictures. How many colored pictures do the 3rd graders have now? Show your work.
