Estimating Sums
Estimate the sum of 1,239 and 285
About 1,500
Estimate the difference of 4,263 and 1,613 by rounding to the nearest thousands.
About 2,000... 4,263---4,000 and 1,613---2,000
Add 486+252+896
1,634
Subtract 379 from 624.
245
If I have 3-$1 bills, 16 quarters, 5 dimes, and 1 penny, how much money do I have?
$7.51
Estimate the sum of 9,454 and 1,680
About 11,000
Estimate the difference of 987 and 64 by rounding to the nearest tens.
987----990 and 64----60 so about 930 is the difference.
Find the sum of 54,236+8,787+15=
63,038
Subtract 662 from 814.
152
If I need to go to band practice at a quarter til 2, what time do I need to be there?
Is 976+499 going to be more or less than 1,400?
Explain your reasoning!
More because 976 will round to 1,000 and 499 will round to 500.
1,000+500=1,500
Explain how you would estimate to subtract 189 from 643.
First round 189 to 200 and 643 to 600...Then subtract 200 from 600 to get about 400.
Luke added 429+699+314 and got 950. Is this sum reasonable?
No...429---400+699---700 is already more than what Luke said the sum was.
Hannah scored 5,772 points playing her favorite computer game. Josh scored 4,881 points on the same game. How many more points did Hannah score than Josh?
Hannah scored 891 more points than Josh.
Olivia started work at 9:00am and is scheduled to work 6 hours and 40 minutes. What time will she be done working today?
Victor has a personal plane. He flies his plane every Saturday and Sunday. Last Saturday he flew his plane 125 miles. Sunday he flew his plane 202 miles. This weekend he plans to fly his plane a total of 400 miles. Will that be more or less than last week?
More...202 rounds to 200 and 125 will round to 100 therefore he flew about 300 miles last weekend!
Sue saved $459 that she got from her birthday. She wanted to purchase a bike from Walmart that was $169.00. She wants to know about how much money she would have left if she bought the bike.
$459.00 is about 500...$169.00 is about 200 so she would have about $300 left over.
Jimmy added 2,676 to 9,845 and got 11,521. Where did Jimmy make a slight mistake?
Jimmy forgot to add the carried 1 at the end to make it become 12,521
Jeremy earned a total of $300 mowing lawns this summer. He plans to use the money he earned to buy a new bike. If the bike costs $279, how much money will Jeremy have left?
$21 left over after he buys the bike.
List the set of numbers in order from Least to Greatest
245 2,575 121 2,570 6,231 2,454
121 245 2,454 2,570 2,575 6,231
The fourth graders are helping raise money for the local animal shelter. They hoped to raise $1,000. So far they have made $465 in Bake sales and $710 in T-shirt sales. About how much more than than $1,000 have they raised?
About $200
Tyler is correct because the Largest Common Place is the hundreds place.
2,498---2,500
788-----800
The 3rd, 4th, 5th, and 6th grades collected aluminum cans for a recycling drive. 3rd grade collected 1,488 cans. 4th grade collected 1,872 cans, 5th grade collected 2,087 cans, and 6th grade collected 2,545 cans. How many cans were collected altogether?
7,992 total cans
He will have $422 left over.
2,570,000