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JSS2: MATHEMATICS - 1ST TERM

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  1. Properties of Whole Numbers I | Week 1
    4 Topics
    |
    1 Quiz
  2. Properties of Whole Numbers II | Week 2
    4 Topics
    |
    1 Quiz
  3. Properties of Whole Numbers III | Week 3
    5 Topics
    |
    1 Quiz
  4. Indices | Week 4
    2 Topics
    |
    1 Quiz
  5. Laws of Indices | Week 5
    5 Topics
    |
    1 Quiz
  6. Whole Numbers & Decimal Numbers | Week 6
    4 Topics
    |
    1 Quiz
  7. Standard Form | Week 7
    3 Topics
    |
    1 Quiz
  8. Significant Figures (S.F) | Week 8
    4 Topics
    |
    1 Quiz
  9. Fractions, Ratios, Proportions & Percentages I | Week 9
    6 Topics
    |
    1 Quiz
  10. Fractions, Ratios, Proportions & Percentages II | Week 10
    4 Topics
    |
    1 Quiz
  11. Fractions, Ratios, Proportions & Percentages III | Week 11
    3 Topics
    |
    1 Quiz
  12. Approximation & Estimation | Week 12
    1 Topic
    |
    1 Quiz



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Lesson Progress
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To add or subtract numbers inside a square root sign, deal with the arithmetic operation first before finding the square root of the answer. 

For example:

Calculate \(\scriptsize \sqrt{3 + 6}\)

Add the two numbers \(\scriptsize \sqrt{3 + 6} = \sqrt{9}\)

Then find the square root.

Calculate \(\scriptsize \sqrt{9} = 3\)

This is the correct way of solving it

\(\scriptsize \sqrt{3 + 6} = \sqrt{9} = 3\)

Example

Calculate
a. \(\scriptsize \sqrt{24 + 12} \)
b. \(\scriptsize \sqrt{26 + 74} \)
c. \(\scriptsize \sqrt{102 \;-\; 38} \)
d. \(\scriptsize \sqrt{24 + 50 \;- \;38} \)

Solution

a. \(\scriptsize \sqrt{24 \:+ \: 12} \\ \scriptsize = \sqrt{36}\\ \scriptsize = 3\)

b. \(\scriptsize \sqrt{26 \:+ \: 74} \\ \scriptsize = \sqrt{100}\\ \scriptsize = 10\)

c. \(\scriptsize \sqrt{102\:- \:38} \\ \scriptsize = \sqrt{64} \\ \scriptsize = 8\)

d. \(\scriptsize \sqrt{24 \:+ \:50 \:- \:38} \\ \scriptsize = \sqrt{74\:- \:38} \\ \scriptsize= \sqrt{36} \\ \scriptsize = 6\)

Evaluation Questions:

A. Use factors to find the square root of the following:

1.  16 
2.  400 
3.  625 
4.  441 
5.  1600
6.  2500
7.  784
8.  7744
9.  3136
10.  3600

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B. Find the smallest number by which the following must be multiplied so that their products are perfect squares.

1. 84 
2. 90
3. 24 
4. 54 
5. 50
6. 40
7. 100
8. 252
9. 360
10. 140

View Answers

Responses

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1. 4

2. 20

3. 25

4. 21

5. 40

6. 50

7. 28

8. 88

9. 56

10. 60

Find the smallest number by which the following must be multiplied so that their products are perfect squares.

1. 21

2. 10

3. 6

4. 6

5. 2

6. 10

7. 1

8. 8

9. 10

10. 35

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