# Estimating a Difference of Whole Numbers Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to **Estimating a Difference of Whole Numbers**. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using **Show Answer** button. You can use **Next Quiz** button to check new set of questions in the quiz.

Q 1 - Estimate the difference 3,664 − 1,486 by first rounding each number to the nearest hundred.

### Answer : B

### Explanation

**Step 1:**

Rounding 3664 to nearest hundred is 3700, as tens digit 6 > 5

**Step 2:**

Rounding 1486 to nearest hundred is 1500, as tens digit 8 > 5

**Step 3:**

So the estimated difference by rounding each number to the nearest hundred is

3,700 − 1,500 = 2,200

Q 2 - Estimate the difference 8,023 − 6,824 by first rounding each number to the nearest hundred.

### Answer : D

### Explanation

**Step 1:**

Rounding 8023 to nearest hundred is 8000, as tens digit 2 < 5

**Step 2:**

Rounding 6824 to nearest hundred is 6800, as tens digit 2 < 5

**Step 3:**

So the estimated difference by rounding each number to the nearest hundred is

8,000 − 6,800 = 1,200

Q 3 - Estimate the difference 46,754 − 42,386 by first rounding each number to the nearest thousand

### Answer : A

### Explanation

**Step 1:**

Rounding 46754 to nearest thousand is 47000, as hundreds digit 7 > 5

**Step 2:**

Rounding 42386 to nearest thousand is 42000, as hundreds digit 3 < 5

**Step 3:**

So the estimated difference by rounding each number to the nearest thousand is

47,000 − 42,000 = 5,000

Q 4 - Estimate the difference 4,836 − 2,453 by first rounding each number to the nearest hundred.

### Answer : C

### Explanation

**Step 1:**

Rounding 4836 to nearest hundred is 4800, as tens digit 3 < 5

**Step 2:**

Rounding 2453 to nearest hundred is 2500, as tens digit is 5

**Step 3:**

So the estimated difference by rounding each number to the nearest hundred is

4,800 − 2,500 = 2,300

Q 5 - Estimate the difference 7,639 − 4,767 by first rounding each number to the nearest hundred.

### Answer : B

### Explanation

**Step 1:**

Rounding 7639 to nearest hundred is 7600, as tens digit 3 < 5

**Step 2:**

Rounding 4767 to nearest hundred is 4800, as tens digit 6 > 5

**Step 3:**

So the estimated difference by rounding each number to the nearest hundred is

7,600 − 4,800 = 2,800

Q 6 - Estimate the difference 41,814 − 26,095 by first rounding each number to the nearest thousand

### Answer : C

### Explanation

**Step 1:**

Rounding 41814 to nearest thousand is 42000, as hundreds digit 8 > 5

**Step 2:**

Rounding 26095 to nearest thousand is 26000, as hundreds digit 0 < 5

**Step 3:**

So the estimated difference by rounding each number to the nearest thousand is

42,000 − 26,000 = 16,000

Q 7 - Estimate the difference 24,921 − 18,538 by first rounding each number to the nearest thousand.

### Answer : D

### Explanation

**Step 1:**

Rounding 24921 to nearest thousand is 25000, as hundreds digit 9 > 5

**Step 2:**

Rounding 18538 to nearest thousand is 19000, as hundreds digit is 5

**Step 3:**

So the estimated difference by rounding each number to the nearest thousand is

25,000 − 19,000 = 6,000

Q 8 - Estimate the difference 36,718 − 21,452 by first rounding each number to the nearest thousand

### Answer : A

### Explanation

**Step 1:**

Rounding 36718 to nearest thousand is 37000, as hundreds digit 7 > 5

**Step 2:**

Rounding 21452 to nearest thousand is 21000, as hundreds digit 4 < 5

**Step 3:**

So the estimated difference by rounding each number to the nearest thousand is

37,000 − 21,000 = 16,000

Q 9 - Estimate the difference 8,462 − 5,946 by first rounding each number to the nearest hundred.

### Answer : C

### Explanation

**Step 1:**

Rounding 8462 to nearest hundred is 8500, as tens digit 6 > 5

**Step 2:**

Rounding 5946 to nearest hundred is 5900, as tens digit 4 < 5

**Step 3:**

So the estimated difference by rounding each number to the nearest hundred is

8,500 − 5,900 = 2,600

Q 10 - Estimate the difference 85,493 − 65,864 by first rounding each number to the nearest thousand.

### Answer : D

### Explanation

**Step 1:**

Rounding 85493 to nearest thousand is 85000, as hundreds digit 4 < 5

**Step 2:**

Rounding 65864 to nearest thousand is 66000, as hundreds digit 8 > 5

**Step 3:**

So the estimated difference by rounding each number to the nearest thousand is

85,000 − 66,000 = 19,000