Vocabulary
_________ the value of a digit depending on its place in a number.
Place Value
Round to the nearest ten.
19
20
28 + 65 = ?
93
90 - 89 = ?
8
Liz painted 236 tiles red and 416 tiles blue. How many tiles did Liz paint?
652 tiles
To adjusting the digits (up or down) to make rough calculations easier is called __________ .
Rounding
Round to the nearest ten.
73
70
384 + 860 = ?
1,244
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
_________ is the process of finding the total, or sum, by combining two or more numbers.
Addition
Round to the nearest hundred.
463
500
648 + 686 = ?
1,334
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
770 + 882 + 934 = ?
2,586
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
__________ is a symbol used to show a number (0, 1, 2, 3, 4, 5, 6, 8, 9)
Digit
Round to the nearest hundred.
1,351
1,400
What is the missing number?
456 + _______ = 1,244
788
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.