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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.

See some of our other supported math practice problems.

### 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

1.
 42+ 53
Estimate
2.
 43+ 48
Estimate

### 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

1.
 57+ 49
Estimate
2.
 30+ 99
Estimate

### 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

1.
 65+ 184
Estimate
2.
 142+ 165
Estimate

### 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

1.
 536+ 618
Estimate
2.
 303+ 298
Estimate

### 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

1.
 770+ 431
Estimate
2.
 943+ 592
Estimate

### 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

1.
 2390+ 4611
Estimate
2.
 4672+ 3802
Estimate

### 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

1.
 7742+ 5030
Estimate
2.
 9495+ 9118
Estimate

### 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

1.
 18550+ 10068
Estimate
2.
 12435+ 16346
Estimate

### 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

1.
 94234+ 79830
Estimate
2.
 83119+ 79859
Estimate

### 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

1
 42+ 53
Estimate
Solution
To get the estimated answer, estimate each operand.
42 => 40
53 => 50
40 + 50 = 90

42 => 42
53 => 53
42 + 53 = 95

2
 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

1
 57+ 49
Estimate
Solution
To get the estimated answer, estimate each operand.
57 => 60
49 => 50
60 + 50 = 110

57 => 57
49 => 49
57 + 49 = 106

2
 30+ 99
Estimate
Solution
To get the estimated answer, estimate each operand.
30 => 30
99 => 100
30 + 100 = 130

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

1
 65+ 184
Estimate
Solution
To get the estimated answer, estimate each operand.
65 => 70
184 => 180
70 + 180 = 250

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

2
 142+ 165
Estimate
Solution
To get the estimated answer, estimate each operand.
142 => 140
165 => 170
140 + 170 = 310

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

1
 536+ 618
Estimate
Solution
To get the estimated answer, estimate each operand.
536 => 500
618 => 600
500 + 600 = 1100

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

2
 303+ 298
Estimate
Solution
To get the estimated answer, estimate each operand.
303 => 300
298 => 300
300 + 300 = 600

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

1
 770+ 431
Estimate
Solution
To get the estimated answer, estimate each operand.
770 => 800
431 => 400
800 + 400 = 1200

770 => 770
431 => 430
770 + 430 = 1200

2
 943+ 592
Estimate
Solution
To get the estimated answer, estimate each operand.
943 => 900
592 => 600
900 + 600 = 1500

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

1
 2390+ 4611
Estimate
Solution
To get the estimated answer, estimate each operand.
2390 => 2000
4611 => 5000
2000 + 5000 = 7000

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

2
 4672+ 3802
Estimate
Solution
To get the estimated answer, estimate each operand.
4672 => 5000
3802 => 4000
5000 + 4000 = 9000

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

1
 7742+ 5030
Estimate
Solution
To get the estimated answer, estimate each operand.
7742 => 8000
5030 => 5000
8000 + 5000 = 13000

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

2
 9495+ 9118
Estimate
Solution
To get the estimated answer, estimate each operand.
9495 => 9500
9118 => 9100
9500 + 9100 = 18600

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

1
 18550+ 10068
Estimate
Solution
To get the estimated answer, estimate each operand.
18550 => 19000
10068 => 10000
19000 + 10000 = 29000

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

2
 12435+ 16346
Estimate
Solution
To get the estimated answer, estimate each operand.
12435 => 12000
16346 => 16000
12000 + 16000 = 28000

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

1
 94234+ 79830
Estimate
Solution
To get the estimated answer, estimate each operand.
94234 => 90000
79830 => 80000
90000 + 80000 = 170000

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

2
 83119+ 79859
Estimate
Solution
To get the estimated answer, estimate each operand.
83119 => 80000
79859 => 80000
80000 + 80000 = 160000

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