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JSS1: MATHEMATICS - 2ND TERM

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  1. Algebraic Processes | Week 1
    4 Topics
    |
    1 Quiz
  2. Simplification of Algebraic Expressions | Week 2
    4 Topics
    |
    1 Quiz
  3. Simplification of Algebraic Expressions 2 (Use of Brackets) | Week 3
    4 Topics
    |
    1 Quiz
  4. Simple Equations | Week 4
    1 Topic
    |
    1 Quiz
  5. Simple Equations II | Week 5
    3 Topics
    |
    1 Quiz
  6. Plane Shapes I | Week 6
    5 Topics
    |
    2 Quizzes
  7. Plane Shapes II | Week 7
    7 Topics
    |
    1 Quiz
  8. Plane Shapes III | Week 8
    7 Topics
    |
    1 Quiz
  9. Decimal and Percentages I | Week 9
    2 Topics
    |
    1 Quiz
  10. Decimal and Percentages | Week 10
    3 Topics
    |
    1 Quiz



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Open Sentences:

Algebra is the branch of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.

We say that \( \scriptsize 15 \: + \: \boxed{?} = 20 \) is an open sentence. We can put any value in the box but usually, only one value will make the open sentence true.

\( \scriptsize 15 \: + \: \boxed{?} = 20 \) will be true if 5 goes in the box

\( \scriptsize 15 \: + \: \boxed{5} = 20 \: is \: true\)

Example 1

Check the following mathematical statements carefully;

i.\(\scriptsize 4 \: + \: 3 = 7 \)true
ii.\(\scriptsize 8 \: – \: 5 = 3 \)true
iii.\(\scriptsize 8\: – \: 5 = 10 \)false
iv.\(\scriptsize 6 \: \times \: 5 = 20 \)false

Example 2

Find the missing numbers that make the following open sentences true:

i. \( \;\;\scriptsize \boxed{?} + 7 = 14 \\ \rightarrow \scriptsize \boxed{7} + 7 = 14 \)

ii. \( \;\;\scriptsize 12 + \boxed{?} = 18 \\\rightarrow \scriptsize 12 + \boxed{6} = 18\)

iii. \(\;\; \scriptsize 14 + 7 = \boxed{?} \\ \rightarrow \scriptsize 14 + 7 = \boxed{21}\)

iv. \( \;\;\scriptsize \boxed{?} \: – \: 15 = 0 \\ \rightarrow \scriptsize \boxed{15} \: – \: 15 = 0 \)

v. \(\;\; \scriptsize 12 \: \times \: \boxed{?} = 36 \\ \rightarrow \scriptsize \scriptsize 12 \: \times \: \boxed{3} = 36\)

vi. \(\;\; \scriptsize \boxed{?} \: \times \: 5 = 40 \\ \rightarrow \scriptsize \boxed{8} \: \times \: 5 = 40 \)

vii. \( \;\; \scriptsize12 \: \div \: \boxed{?} = 3 \\ \rightarrow \scriptsize12 \; \div \: \boxed{4} = 3 \)

viii. \( \;\; \scriptsize (5 \: \times \: 8) \: – \: 5 = \boxed{?} \\ \rightarrow \scriptsize 40 \: – \: 5 = \boxed{35}\)

Remember BODMAS. We solve the bracket first before we subtract.

PRACTICE FUN QUIZZES!!

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How fast can you solve these quizzes on addition, multiplication and division? There are 7 questions in each quiz.

Addition Quiz

Multiplication Quiz

Subtraction Quiz

Division Quiz

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