Estimating Sum or Difference

Q.

The digit whose place value remains fixed is ----------------

Q.

Find three consecutive odd numbers whose sum is $147$.

Q.

Question 4 (vii)

Find the value of:
$\frac{3}{13}÷\left(\frac{-4}{65}\right)$

Q.

Round off the following number to the nearest lakhs: $6,29,636$

Q.

Write the smallest six-digit number using three different digits

Q.

The difference between two numbers is $8,67,593$. If the smaller number is $6,34,389$; find the greater number.

Q.

Question 3 (ii)

Subtract:

$6xyfrom-12xy$

Q.

Solve :

$(-3)+7-\left(19\right)$

Q. Round off 48 to the nearest tens.

1. 45
2. None of the above
3. 40
4. 50

Q.

Round off the following number to the nearest tens: $13$

Q.

Question 1 (ii)

Find the sum:
$\frac{5}{3}+\frac{3}{5}$

Q.

The digit whose place value remains fixed is one. how? can you explain this.

Q.

The weight of $5$ bags of rice is $490Kg.$ What will be the weight of $1$ bag of rice?

1. $2450kg.$

2. $98kg.$

3. $92kg.$

4. $70kg.$

Q.

Find the difference between the greatest and the smallest numbers each of which on rounding off gives 5400.

Q. Cost of 4 dozen Banana is rupees 60 how many bananas can be purchased for rupees 12.50

Q. The population of a city was 354976 in the year 2014. In the year 2015, it increased by 68438. What was the population of the city at the end of the year 2015?

1. 413816
2. 400410
3. 522614
4. 423414

Q.

Estimate and compare with the actual sum:

$9864+2349$

Q.

Approximate the following to the nearest lakh.

$93,58,490$

Q.

Round off the following number to the nearest tens: $64$

Q.

Round off the following number to the nearest ten thousands: $77,723$

Q. Find the sum of 65430 and 4560 after rounding them off to the nearest hundreds.

1. 70, 000
2. 71, 000
3. 69, 500
4. 70, 500

Q.

1 metre is divided into 10 equal parts. Can we put together some of these to get metre? How about metre?

Q.

The temperature of the city at $10$ am was ${26.5}^{\circ }C$. It rose by ${4.5}^{\circ }C$ during the next $4$ hours. A spell of rain brought the temperature down by ${5.5}^{\circ }C$. It rose again by ${2.5}^{\circ }C$. What was the temperature at the end of the day?

Q.

Find the sum and the difference between the largest 4 -digit number and the smallest 5 -digit number.

Q.

Round off to the nearest hundred, what numbers can be estimated as $900$.

Q. In ICC World Cup, Sachin Tendulkar scored 117, 99, 78, 156 and 45 in the 1st five matches. In the previous World Cup, the maximum runs he scored was 688. How many more runs does Sachin need to score to break the previous record?

1. 177
2. 213
3. 344
4. 194

Q.

There are 9, 24, 09, 540 women; 7, 65, 85, 372 men and 3, 78, 49, 075 children in a city. What is the total population of the city?

Q.

The monthly expense of Pavan in the month of July was Rs 40, 000 and in the month of June it was Rs 35, 000. In which month did he save more, if his monthly income is Rs 60, 000?

1. Same in both the months.

2. June

3. July

4. Insufficient information

Q.

Rounding off the nearest hundred : $35789$

Q.

Round off $29,643$ to the nearest ten thousand