Estimate Sums
Estimate by rounding each number to the nearest thousand, then find the sum:
5,753
2,250
3,160
6,000
2,000
3,000
= 11,000
100
+
822
136
–
33
103
500
- 345
155
Estimate the difference by rounding each number to the nearest thousand and then subtracting.
9,913 − 9,033
1,000
Estimate to the nearest hundreds and find the sum:
452 + 275
500+300=800
441
+
228
=
669
739
–
287
452
Jared had a great soccer season and scored 16 goals for his team. Kyle, the team's top scorer, made 6 more goals than Jared. How many total goals did these two players score?
Estimate by rounding each number to the nearest thousand, then find the difference:
5,753
2,250
3,160
6,000
2,000
3,000
=1,000
Estimate the sum by rounding each number to the nearest thousand and then adding.
3,424 + 4,998
8,000
Damon is a school janitor. Last week he picked up 118 pieces of trash in the classrooms and 74 pieces outside. How many pieces did he pick up in all?
192
Brooke runs her own baking company. This morning, Brooke's workers baked 330 chocolate mousse pies. They also baked some more after lunch. In total, they baked 757 chocolate mousse pies. How many chocolate mousse pies did Brooke's workers bake after lunch?
427
3,000
- 2450
5,450
Estimate the difference by rounding each number to the nearest ten thousand and then subtracting.
25,559 − 18,824
10,000
Estimate the sum by rounding each number to the nearest ten thousand and then adding.
10,913 + 52,477
60,000
10,881
+ 5,256
16,137
Recently, the value of Ellie's college savings fund decreased by $390. If her fund was worth $899 before, how much is it worth now?
$509
9,601
- 939
8,662
30,000 OR 70,000
30,000
Estimate the sum by rounding each number to the nearest hundred thousand and then adding.
344,773 + 221,844
500,000
7,326
+ 5,759
2,315
15,400
26,575
- 17,088
9,487
4,005
–
1,169
2,836
60,000 OR 160,000
60,000