Addition
124 + 236
360
486 - 352
134
6 x 8
48
20 / 5
4
There are 24 students in Mr. Smith's class and 19 students in Mrs. Potter's class. Estimate to the nearest ten to find the approximate number of students in the two classes combined.
20 + 20 = 40
257 + 139
396
125 - 98
27
9 x 11
99
69 / 3
23
Ava has saved 346 pennies. Jaxon has saved 463 pennies. Estimate to the nearest hundred the amount of money they have together.
300 + 500 = 800
602 + 189
791
460 - 125
335
35 x 7
245
99 / 9
11
Raina estimated the money she saved to the nearest hundred. She estimates she has $400. What numbers below could be her actual amount of money? a. 443 b. 327 c. 489 d. 354 e. 519
a,d
4,498 + 394
4,892
1,643 - 275
1,368
123 x 4
492
112 / 4
28
Dominic earned $21 cutting grass on Friday, $28 on Saturday, and $24 on Sunday. He is saving money to buy a new video game that costs $67. Round the numbers to the nearest ten to see if Dominic has earned enough money to buy the game.
20 + 30 + 20 = 70, 67 = 70. He has enough!
98,679 + 87,799
186,478
6,000 - 627
5,373
576 x 13
7,488
756 / 12
63
Bob estimated the difference of 73 and 42. He estimated the answer to be 40. What mistake did he make?
He rounded 73 to 80 instead of 70