Estimating Products of Numbers

Q.

In an election, the successful candidate registered $5,77,500$ votes and his nearest rival secured $3,48,700$ votes. By what margin did the successful candidate win the election?

Q.

Question 3(c)

Estimate the following product using general rule:
1291 x 592

Q.

In an election the winning candidate got $628246$ votes, his nearest rival got $4,52,752$ votes and the third candidate got $67,350$ votes. If $3,846$votes were declared invalid what was the total number of votes polled in the constituency?

Q.

A student multiplied $7236$ by $65$ instead of multiplying by $56$.How much was his answer greater than the correct answer ?

Q.

Estimate the following products using general rule:

(a) 578 × 161 (b) 5281 × 3491

(c) 1291 × 592 (d) 9250 × 29

Q.

455 on rounding off to the nearest tens is equal to

1. 450

2. 400

3. 460

4. 500

Q.

Find estimated quotient for the following:

347÷13

Q.

Estimate the following products using general rule:

(a) 578 × 161 (b) 5281 × 3491

(c) 1291 × 592 (d) 9250 × 29

Q.

Estimate the following sum to its nearest ten:

67+40

Q. Estimate the following by rounding off each factor to nearest thousands:

(i) 12, 904 + 2, 888
(ii) 28, 292 − 21, 496

Q.

The estimation of the product of 52 and 188 is equal to

1. 20000

2. 9000

3. 10000

4. 9500

Q.

Give a rough estimate ( by rounding off to the nearest hundred ) and also a closer estimate ( by rounding off to nearest tens ) : $438+332+4215$

Q. Estimate the following product using general rule:
578 x 161

Q.

$\left(-11\right)\times 7$is not equal to

1. $11\times (-7)$

2. $-\left(11\times 7\right)$

3. $\left(-11\right)\times \left(-7\right)$

4. $7\times \left(-11\right)$

Q.

Give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens) of $439+334+4317$.

Q.

Question 8

A student multiplied 7236 by 65 instead of multiplying by 56. By how much was his answer greater than the correct answer?

Q. There are 56 students in the class. If each student has 6 books, total number of books in the class will be

1. 245
2. 336
3. 124

Q.

If a number is equi-distant from two nearest multiple of hundreds, then it is rounded of as ______ multiple of hundred.

1. Lesser

2. Twice

3. Equal

4. Greater

Q.

Velocity of light was first determined in the laboratory by

1. Foucault

2. Galileo

3. Michelson

4. Newton

Q. Estimate the product of 147 and 51.

1. 4000
2. 5000
3. 6000
4. 7000

Q. Estimate the product of 358 and 326.

1. 1, 20, 000
2. 1, 00, 000
3. 2, 00, 000
4. 1, 50, 000

Q.

Ashley can ride her bicycle $15\text{miles}$ in $2\text{hours}$

There are $60\text{minutes}$ in $1\text{hour}$, and there are $\text{1760 yards}$ in $1\text{mile}$.

How many yards does Ashley travel.

Q.

Question 3(a)

Estimate the following product using general rule:
578 x 161

Q.

The height of a mountain is 4255 metres. On rounding off to nearest thousands, the height becomes ______ .

1. 40000 m

2. 400 m

3. 4000 m

4. 5000 m

Q.

Estimated the value of the product of 108 and 12.

1. 1296

2. 1290

3. 2000

4. 1000

Q.

Estimate the following products.

f) $8,106\times 872$

Q. Estimate each of the following sum to its nearest tens.

Q.

Fill in the blanks :

$1crore=\_\_\_\_thousands$

Q. Estimate the product of 42 and 37.

1. 1, 200
2. 1, 600
3. 2, 000
4. 2, 500

Q.

Question 11

The distance between the school and a student's house is 1km 875m. Every day she walks both ways. Find the total distance covered by her in six days.