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Estimating Sums & Differences
By NICHOLAS GLAESER
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Last updated almost 2 years ago
14 questions
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Round & Estimate
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5.3.A
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Estimate, Then Compare
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5.3.K
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Round the numbers to the leading digit. Estimate the sum or difference.
3,576 → 4,000 198,248 → 200,000
+ 1,307
→
+1,000
− 116,431
→
− 100,000
is about →
5,000
is about →
100,000
Question 1
1.
Round the numbers to the leading digit. Estimate the sum or difference.
675 → __________
+ 489
→ __________
is about → __________
Question 2
2.
Round the numbers to the leading digit. Estimate the sum or difference.
21,481 → __________
− 12,500
→ __________
is about → __________
Question 3
3.
Round the numbers to the leading digit. Estimate the sum or difference.
7,834 → __________
+ 3,106
→ __________
is about → __________
Question 4
4.
Round the numbers to the leading digit. Estimate the sum or difference.
682,778 → __________
+ 130,001
→ __________
is about → __________
Question 5
5.
Round the numbers to the leading digit. Estimate the sum or difference.
58,499 → __________
− 22,135
→ __________
is about → __________
Question 6
6.
Round the numbers to the leading digit. Estimate the sum or difference.
902,279 → __________
− 615,999
→ __________
is about → __________
Question 7
7.
Round the numbers to the leading digit. Estimate the sum or difference.
46,801 → _______
+ 34,700
→ _______
is about → _______
Question 8
8.
Round the numbers to the leading digit. Estimate the sum or difference.
9,734 → _______
− 8,306
→ _______
is about → _______
Question 9
9.
Round the numbers to the leading digit. Estimate the sum or difference.
65,606 → _______
+ 85,943
→ _______
is about → _______
Question 10
10.
Round the numbers to the leading digit. Estimate the sum or difference.
5,218 → _______
− 3,673
→ _______
is about → _______
Question 11
11.
Round the numbers to the leading digit. Estimate the sum or difference.
745 → _______
+ 451
→ _______
is about → _______
Question 12
12.
Round the numbers to the leading digit. Estimate the sum or difference.
337,297 → _______
− 168,931
→ _______
is about → _______
Question 13
13.
Write < or > for each problem.
329 + 495 __________ 800
11,569 − 6,146 __________ 6,000
563 − 317 __________ 300
8,193 − 6,668 __________ 1,000
Question 14
14.
Write < or > for each problem.
41,924 − 12,445 __________ 50,000
634,577 + 192,556 __________ 800,000
18,885 + 12,691 __________ 30,000
713,096 − 321,667 __________ 400,000