Rounding off Numbers Using Estimation

Q.

Estimate the following product :$9\times 795$

Q. 19, 435 rounded off to the nearest hundred is _______.

1. 19400

Q.

Round off 434 to the nearest ten.

1. 430
2. 440
3. 435
4. 445

Q.

Round off 5985 to the nearest hundred.

1. 5900
2. 6000
3. 5800
4. 5950

Q.

A city has a population of 72582. Round off the population to the nearest hundred.

1. 72600

2. 72500

3. 73500

4. 72580

Q.

Round off 329 to the nearest ten.

1. 325
2. 330
3. 320
4. 335

Q. 26 rounded off to the nearest 10 is ______.

1. 30

Q.

Round off 3746 to the nearest hundred.

1. 3750

2. 3740

3. 3700

4. 3800

Q.

20987 when rounded off to the nearest ten will be ___.

1. 20900
2. 20990
3. 21000
4. 20980

Q.

30982 when rounded off to the nearest hundred will be _____.

1. 30000
2. 30800
3. 31000
4. 30900

Q.

Round each addend to the nearest ten

Estimate the sum

Q.

Write $3.19$ in words.

Q. The length of River Ganga is 3255 km. When rounded off to the nearest hundred, its length will be:

1. 3250 km

2. 3260 km

3. 3200 km

4. 3300 km

Q.

Round off 3589 to the nearest hundred.

1. 3500
2. 4000
3. 3600
4. 3590

Q.

Estimate and compare with the actual sum:

$760+683$

Q.

Round off $4718$ to the nearest thousands.

Q.

956.4\15.9 {round off to the nearest tenth}

Q. The smallest number which when rounded off the nearest hundred as 600, is
(a) 550
(b) 595
(c) 604
(d) 599

Q.

Find the value of $10\times 887\times 461-8870\times 361$by using suitable properties.

Q.

The decimal $4.725$ is equal to $4.72$ correct to two decimal places.

1. True
2. False

Q.

Estimate the following sum to its nearest ten:

567+432

Q.

Without actual calculation, estimate:

$447÷31$

Q.

Which number should be added to 3439 to make it a multiple of 100?

1. 71
2. 61
3. 60
4. 36

Q.

Round off $60705$ to the nearest hundred.

Q.

Which multiple of ten comes just after the number 434?

1. 430
2. 440
3. 445
4. 435

Q.

Round off 626 to the nearest ten.

1. 620

2. 700

3. 600

4. 630

Q.

In couple of practice questions, there were problems which mentioned round off the number to nearest hundred and then multipy etc. One example was 986 and round off to nearest hundred. The answer explanation says rounded value is 990. Isnt it 1000 when rounded to nearest hundred? 990 is rounding to nearest tens. Isnt it? Kindly explain.

Q.

Using shortcut to determine $2723\times 9999$.

Q. The chapter "Whole Numbers (2)" has question no. 5 on page no. 24. Explain/Solve.

Q.

3425 rounded off to the nearest ten is___

1. 3400

2. 3500

3. 3420

4. 3430