Vocab
What is the addition property is shown?
7+0=7
Identity Property
Round to the nearest hundred to estimate.
514 + 258
500 + 300 = 800
Round to the nearest hundred to estimate.
891 − 686
Round to the nearest hundred.
473
500
Dog Man had 82 bones in his secret stash. After sharing some with Petey, he has 47 bones left. About how many bones did Dog Man give away?
Round to the nearest ten.
30 bones
What property of addition is shown?
(2+3)+4=2+(3+4)
Associative Property
Round to the nearest ten to estimate.
218 + 466
220 + 470 =690
Round to the nearest ten to estimate.
461 − 216
460 − 220 =240
Round to the nearest ten.
155160
Petey built a robot with 263 metal parts. After a big explosion in his lab, 134 parts fell off. About how many parts are still on the robot?
Round to the nearest hundred.
200 parts
What property of addition is shown?
4+15=15+4
Commutative Property
Round to the nearest ten to estimate.
812 + 257
810 + 260 =1,070
Round to the nearest ten to estimate.
617 − 181
620 - 180 =440
Round to the nearest ten.
4
0
Lila ordered 235 slices of pizza for a big party. The first group of friends ate 127 slices. The second group ate 64 slices. About how many slices are left? Round to the nearest ten.
50 slices
Fill in the blank:
We ____ when we estimate to the nearest 10 or 100.
Round
Emma and Liam are collecting squishies. Emma has 47 squishies, and Liam has 38 squishies. About how many stickers do they have altogether?
90 squishies
Nye had 86 Robux in her account. After buying a new avatar outfit, she has 43 Robux left. About how many Robux did Nye spend?
50 Robux
Round to the nearest hundred.
56
100
Chief bought 720 Dog Man action figures to give away at an event. On Monday, he handed out 346 figures. On Tuesday, he gave out 275 more. About how many action figures does Chief have left?
Round to the nearest ten
90 action figures.
The type of math you can do in your head, without a pencil and paper.
Mental Math
Jaxon and his friends are saving up for WrestleMania tickets! They need about $900 to buy their tickets. Jaxon has saved $418 from mowing lawns. His friend, Leo, saved $382 from selling action figures. About how much more money do they need to buy their tickets?
Round to the nearest hundred.
$100
Dog Man is chasing down the Fleas, a group of villains causing chaos in Paulsboro! He needs to travel 800 miles to catch them. On the first day, he zooms 368 miles in his police car. On the second day, he runs 78 miles through the streets. About how many more miles does Dog Man need to travel before he catches the Fleas? Round to the nearest hundred
300 miles
Round to the nearest hundred.
2,637
2,600
A basketball team scored 735 points this season. In the first half of the season, they scored 362 points. In the second half, they scored 289 points. About how many points do they still need to reach 1,000 points?
Round to the nearest 10
350 points