Vocabulary
I should always start solving an addition or subtraction problem in the ______ place.
ones
Round to the nearest ten.
19
20
28 + 65 = ?
93
90 - 89 = ?
Liz painted 236 tiles red and 416 tiles blue. How many tiles did Liz paint?
652 tiles
This is a way to say which number a given number is closer to.
Example: For 182, the number 180 is the closest multiple of ten and 200 is the closest multiple of a hundred.
rounding
Round to the nearest ten.
73
70
84 + 60 = ?
144
419 - 12 = ?
407
Michael's assignment this weekend is to read a book with 272 pages. On Saturday, he read forty-nine pages. How many pages does he need to read on Sunday?
223 pages
addition
Round to the nearest hundred.
463
500
237 + 148 = ?
385
615 - 374 = ?
241
Blanca subtracted 432 from 671 and got 239 as the difference. Which expression could Blanca use to check if her answer is correct?
A. 671 + 432
B. 671 + 239
C. 432 + 239
D. 432 – 239
C. 432 + 239
To take away from a group or a number of things is called ________.
subtraction
Round to the nearest ten.
675
680
648 + 686 = ?
1,334
What is the missing number.
756 - 246 = ?
510
5th grade collected 568 cans for the food drive. 3rd grade collected 275 cans. 18 cans fell off the table and had to be thrown away. How many cans did they have left?
825 cans
This is the way of writing a number as a sum of hundreds, tens, and ones.
Example: 400 + 80 + 2 = 482
expanded form
Round to the nearest hundred.
351
400
770 + 882 = ?
1,652
239
Ethan earned 210 points in his game. The second time he played it, he lost 62 points. Then he earned 120 points. About how many points does Ethan have?
He has about 300 points.