Math Practice Problems - Estimated Addition

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Estimated Addition - Sample Math Practice Problems

The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References to complexity and mode refer to the overall difficulty of the problems as they appear in the main program. In the main program, all problems are automatically graded and the difficulty adapts dynamically based on performance. Answers to these sample questions appear at the bottom of the page. This page does not grade your responses.

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Complexity=100

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Complexity=200

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Complexity=700

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Complexity=1000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Complexity=5000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Complexity=10000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Complexity=20000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Complexity=100000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Answers

Complexity=60

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

42
+ 53

Estimate

Solution
To get the estimated answer, estimate each operand.
42 => 40
53 => 50
40 + 50 = 90

Alternate Answer
42 => 42
53 => 53
42 + 53 = 95

Problem

Correct Answer

Your Answer

43
+ 48

Estimate

Solution
To get the estimated answer, estimate each operand.
43 => 40
48 => 50
40 + 50 = 90

Complexity=100

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

57
+ 49

Estimate

Solution
To get the estimated answer, estimate each operand.
57 => 60
49 => 50
60 + 50 = 110

Alternate Answer
57 => 57
49 => 49
57 + 49 = 106

Problem

Correct Answer

Your Answer

30
+ 99

Estimate

Solution
To get the estimated answer, estimate each operand.
30 => 30
99 => 100
30 + 100 = 130

Alternate Answer
30 => 30
99 => 99
30 + 99 = 129

Complexity=200

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

65
+ 184

Estimate

Solution
To get the estimated answer, estimate each operand.
65 => 70
184 => 180
70 + 180 = 250

Alternate Answer
65 => 70
184 => 200
70 + 200 = 270

Problem

Correct Answer

Your Answer

142
+ 165

Estimate

Solution
To get the estimated answer, estimate each operand.
142 => 140
165 => 170
140 + 170 = 310

Alternate Answer
142 => 100
165 => 200
100 + 200 = 300

Complexity=700

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

536
+ 618

Estimate

Solution
To get the estimated answer, estimate each operand.
536 => 500
618 => 600
500 + 600 = 1100

Alternate Answer
536 => 540
618 => 620
540 + 620 = 1160

Problem

Correct Answer

Your Answer

303
+ 298

Estimate

Solution
To get the estimated answer, estimate each operand.
303 => 300
298 => 300
300 + 300 = 600

Alternate Answer
303 => 300
298 => 300
300 + 300 = 600

Complexity=1000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

770
+ 431

Estimate

Solution
To get the estimated answer, estimate each operand.
770 => 800
431 => 400
800 + 400 = 1200

Alternate Answer
770 => 770
431 => 430
770 + 430 = 1200

Problem

Correct Answer

Your Answer

943
+ 592

Estimate

Solution
To get the estimated answer, estimate each operand.
943 => 900
592 => 600
900 + 600 = 1500

Alternate Answer
943 => 940
592 => 590
940 + 590 = 1530

Complexity=5000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

2390
+ 4611

Estimate

Solution
To get the estimated answer, estimate each operand.
2390 => 2000
4611 => 5000
2000 + 5000 = 7000

Alternate Answer
2390 => 2400
4611 => 4600
2400 + 4600 = 7000

Problem

Correct Answer

Your Answer

4672
+ 3802

Estimate

Solution
To get the estimated answer, estimate each operand.
4672 => 5000
3802 => 4000
5000 + 4000 = 9000

Alternate Answer
4672 => 4700
3802 => 3800
4700 + 3800 = 8500

Complexity=10000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

7742
+ 5030

Estimate

Solution
To get the estimated answer, estimate each operand.
7742 => 8000
5030 => 5000
8000 + 5000 = 13000

Alternate Answer
7742 => 7700
5030 => 5000
7700 + 5000 = 12700

Problem

Correct Answer

Your Answer

9495
+ 9118

Estimate

Solution
To get the estimated answer, estimate each operand.
9495 => 9500
9118 => 9100
9500 + 9100 = 18600

Alternate Answer
9495 => 9000
9118 => 9000
9000 + 9000 = 18000

Complexity=20000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

18550
+ 10068

Estimate

Solution
To get the estimated answer, estimate each operand.
18550 => 19000
10068 => 10000
19000 + 10000 = 29000

Alternate Answer
18550 => 20000
10068 => 10000
20000 + 10000 = 30000

Problem

Correct Answer

Your Answer

12435
+ 16346

Estimate

Solution
To get the estimated answer, estimate each operand.
12435 => 12000
16346 => 16000
12000 + 16000 = 28000

Alternate Answer
12435 => 10000
16346 => 20000
10000 + 20000 = 30000

Complexity=100000

Estimate the sum using the highest practical magnitude.
Example 1: 53 + 19 => 50 + 20
Example 2: 123 + 57 => 120 + 60
Example 3: 1598 + 2301 => 2000 + 2000

Problem

Correct Answer

Your Answer

94234
+ 79830

Estimate

Solution
To get the estimated answer, estimate each operand.
94234 => 90000
79830 => 80000
90000 + 80000 = 170000

Alternate Answer
94234 => 94000
79830 => 80000
94000 + 80000 = 174000

Problem

Correct Answer

Your Answer

83119
+ 79859

Estimate

Solution
To get the estimated answer, estimate each operand.
83119 => 80000
79859 => 80000
80000 + 80000 = 160000

Alternate Answer
83119 => 83000
79859 => 80000
83000 + 80000 = 163000

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