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JSS3: MATHEMATICS - 1ST TERM

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  1. Binary Number System I | Week 1
    5Topics
    |
    1 Quiz
  2. Binary Number System II | Week 2
    6Topics
    |
    1 Quiz
  3. Word Problems I | Week 3
    4Topics
    |
    1 Quiz
  4. Word Problems with Fractions II | Week 4
    1Topic
    |
    1 Quiz
  5. Factorisation I | Week 5
    4Topics
    |
    1 Quiz
  6. Factorisation II | Week 6
    3Topics
    |
    1 Quiz
  7. Factorisation III | Week 7
    3Topics
    |
    1 Quiz
  8. Substitution & Change of Subject of Formulae | Week 8
    2Topics
    |
    1 Quiz
  9. Simple Equations Involving Fractions | Week 9
    3Topics
    |
    1 Quiz
  10. Word Problems | Week 10
    1Topic
    |
    1 Quiz
Lesson Progress
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To do this, first, convert the given base to base ten, then convert to the required base.

i. Convert  405six to base two

First convert to base 10

405six =  4 x 62 + 0 x 61+ 5 x 60

144 + 0 + 5 =  149ten

149Ten to base 2

Screen Shot 2020 11 27 at 9.13.14 PM

= 10010101two

ii. Convert 10110two to base seven

First convert to base 10

10110two = 1 x 24 + 0 x 23 + 1 x 22 + 1 x 21 + 0 x 20

16 + 0 + 4 + 2 + 0 = 22ten

Then base to 7

Screen Shot 2020 11 27 at 9.15.58 PM

= 31seven

iii. Convert 321four to base two

321four = 3 x 42 + 2 x 41 + 1 x 40

48 + 8 + 1 = 57ten

Screen Shot 2020 11 27 at 9.18.01 PM

= 111001two

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