*NOTE: Answers to all questions are given at the end of this exercise.*

__Question No. 1: __

**Round off the following:**

**(a) 456g to the nearest 10g.**

**(b) 722g to the nearest 100g.**

**(c) 3.27cm to the nearest cm.**

**(d) 123.452cm to 1 decimal place.**

**(e) 18.2 to nearest whole number.**

**(f) 31.256m to the nearest 10 m.**

**(g) 12.35cm to the nearest 0.1 cm.**

**(h) 4325 pupils to the nearest 100 pupils.**

**(i) 845km to the nearest 10km.**

**(j) 22.58 mm to the nearest 1/10mm.**

NOTE: Answers to all questions are given at the end of this exercise.

**Question No. 2:**

**State the number of significant figures in each of the following:**

NOTE: Answers to all questions are given at the end of this exercise.

__Question No. 3:
__

**Express the following numbers correct to the number of significant figure indicated within the bracket:**

NOTE: Answers to all questions are given at the end of this exercise.

__Question No. 4:
__

**(a) Estimate the value of 7.94/2.01 correct to 1 significant figure.**

(b) use your result to estimate the value of 79400/0.000201

(b) use your result to estimate the value of 79400/0.000201

NOTE: Answers to all questions are given at the end of this exercise.

__Question No. 5:
__

**Estimate the value of 21.83 x 0.498/220.1, giving your answer correct to 3 significant figures.**

NOTE: Answers to all questions are given at the end of this exercise.

__Question No. 6:
__

**Express 28.136275 correct to two significant figures. How many decimal places are there in the result?**

NOTE: Answers to all questions are given at the end of this exercise.

__Question No. 7:
__

**Express 0.21108794 correct to three significant figures. Write down the number of decimal places in the result.**

NOTE: Answers to all questions are given at the end of this exercise.

__Question No. 8:
__

**Express 0.0083457 correct to four decimal places. State the number of significant figures in the answer?**

NOTE: Answers to all questions are given at the end of this exercise.

__Question No. 9:
__

**Express 117.9648 correct to four decimal places. How many significant figures are there in the answer?**

**Answers**

**(from left to right)**

## Leave a Reply