Question

4. Round off
(a) 4.918 m to the nearest 0.1 m,
(b) 9.71 cm to the nearest cm,
(c) $10.982 to the nearest ten cents,
(d) 6.489 kg to the nearest -
- kg.
100​

Answer 1

a. 4.9m
b. 10cm
c. $11.00
d. 6kg

Answer 2

Answer:

Rounding off means estimating precisely

(a) 4.918 m to the nearest 0.1 m

• Rounding off to 0.1 m means to estimate it to one decimal place
• Now we have to check digit at second decimal place which is 1
• Rule: If digit is greater or equal to 5 increase one to previous digit

So the answer will be: 4.9 m

(b) 9.71 cm to the nearest cm,

• We have to round it off to nearest cm.
• As the digit after decimal is greater than 5
• 9 will be increased by 1

So the answer will be: 10 cm

(c) $10.982 to the nearest ten cents,

• We have to round it off to nearest cents
• As the digit after decimal is greater than 5
• 10 will be increased by 1

So the answer will be: $11

(d) 6.489 kg to the nearest - kg.

• We have to round it off to nearest kg
• As the digit after decimal is 4 , smaller than 5
• We will check on to the next digit, 8 is greater than 5
• previous digit (4) will be increased by 1

So the answer will be: 6.5 kg

I hope it will help you!