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# Worksheet on Estimation of Numbers

## Worksheet of Estimation of Numbers

### Solved Questions on Estimation of Numbers

1. A cricket match is watched by 35,547 people. Round this number to the nearest hundred?

a) 36,000
b) 36,500
c) 34,500
d) 35,500

Explanation: To write the number 35,547 correctly to the nearest hundred, you need to round it to the nearest multiple of 100. In our case, since the tens digit is 4, we round down.

So, the number 35,547 rounded to the nearest hundred is 35,500.

2. Estimate the value of (43 x 26) / (17 - 8) to the nearest whole number.

a) 100
b) 110
c) 120
d) 130

Explanation: To estimate the value of the expression, we can round the numbers to nearest tens. In this case, we can round 43 to 40 and 26 to 30. We can also round 17 to 20 and 8 to 10.

Therefore, the estimated value of the expression is (40 x 30) / (20 – 10) = 120.

3. Estimate: 3.4 x 2.7 / 0.7?

a) 6
b) 8
c) 7
d) 9

Explanation: To estimate the value of the expression, we can rounded of the numbers. In this case, we can round 3.4 to 3 because 4 is less than 5, 2.7 to 3 because 7 is greater than 5, and 0.7 to 1 because 7 is greater 5.

Therefore, the estimated value of the expression is 3 x 3/1 = 9.

4. Estimate: (72.4 + 39.9) x 8.7?

a) 900
b) 1008
c) 998
d) 1017

Explanation: To estimate the value of the expression, we can rounded of the numbers. In this case, we can round 72.4 to 72 because 4 is less than 5, 39.9 to 40 because 9 is greater than 5 and 8.7 to 9 because 7 is greater 5.

Therefore, the estimated value of the expression is (72 + 40) x 9 = 1008.

5. Estimate: 32.6% of 860?

a) 270
b) 280
c) 297
d) 300

Explanation: To estimate the value of the expression, we can rounded of the numbers. In this case, 32.6% can be rounded to 33% = 33/100 = 0.33.

Therefore, the estimated value of the expression is 0.33 x 860 = 283.8.

### Practice Questions on Estimation of Numbers

1. What is the estimated number of jellybeans in a jar if there are 359 and you estimate it to be around a hundred?

a) 375
b) 390
c) 385
d) 400

2. What is the estimate of the sum of 825 and 732?

a) 1500
b) 1300
c) 1600
d) 1700

3. Round off 4862 to the nearest thousand.

a) 5000
b) 4000
c) 4800
d) 4900

4. Estimate the product using general rule: 23 and 44.

a) 1000
b) 900
c) 800
d) 700

5. Estimate the quotient of 872 divided by 9.

a) 90
b) 95
c) 100
d) 105

6. Round off 55614 to the nearest thousand.

a) 45200
b) 56000
c) 55000
d) 56500

7. Round off 1248 to the nearest hundred.

a) 1200
b) 1300
c) 1400
d) 1500

8. Estimate the sum of 46 + 63.

a) 100
b) 105
c) 110
d) 115

9. Estimate the product using general rule: 17 and 12.

a) 170
b) 180
c) 190
d) 200

10. Estimate the value of (4321 x 8764) / (1234 x 5678) to the nearest thousand.

a) 5
b) 6
c) 7
d) 8