Q12 of 12 Page 23

Round off the given numbers to the nearest tens hundreds and thousands 75847 Tens _______ 75847 Hundreds _______ 75847 Thousands ________ 75847 Ten thousands ________

The place value chart of a number - 5267431640 is given below:


i. 75847 ⇒ Nearest Tens = 75850


Numbers that have the last digits > 5, then the digits at ten’s place is increased by one and the place at one’s position is made 0.


If the last digit < 5, then the digits at ten’s place is decreased by one and the place at one’s position is made 0.


ii. 75847 ⇒ Nearest Hundreds = 75800


Numbers that have the last two digits as 50 or more should be rounded up to the next even hundred.


iii. 75847 ⇒ Nearest Thousands = 76000


Numbers that have the last three digits as 500 or more should be rounded up to the next thousand.


iv. 75847 ⇒ Nearest Ten thousand = 80000


Numbers that have the last three digits as 5000 or more should be rounded up to the next ten thousand.


More from this chapter

All 12 →
8

Read these numbers. Write them using placement boxes and then write their expanded forms.

(i) 475320


(ii) 9847215


(iii) 97645310


(iv) 30458094


(a) Which is the smallest number?


(b) Which is the greatest number?


(c) Arrange these numbers in ascending and descending orders.

 9

Express 23150 as a product of its prime factors. Is it unique?

 10

Now make the greatest and the smallest 4-digit numbers by using any one digit twice.

(a) 3 8 7 (b) 9 0 5 (c) 0 4 9 (d) 8 5 1 (Hint: Think in each case which digit will you use twice.)

 11

Below is an equation that is not correct yet. By adding some plus signs and minus signs between the digits on the left side (without changes the order of the digits), the equation can be made correct. 123456789 = 100.

Question: How many different ways are there to make the equation correct? One way: 123 – 45 – 67 + 89 = 100. Can you give a systematic way to find answers ?123 + 45 –67 + 89 = 100, 1 + 2 – 3 + 4 + 5 + 6 + 78 + 9 = 100, 12 + 3 – 4 + 5 + 67 + 89 = 100, 1 + 2 + 34 – 5 + 67 – 8 + 9 = 100, 1 + 23 – 4 + 5 + 6 + 78 –9 = 100, 1 + 2 + 3 – 4 + 5 + 6 + 78 + 9 = 100, 12 –3 – 4 + 5 – 6 + 7 + 89 = 100, 12 + 3 4 + 5 –6 – 7 + 89 = 100, 1 + 23 – 4 + 56 + 7 + 8 + 9 = 100