# Lesson Notes By Weeks and Term - Junior Secondary School 1

Revision

SUBJECT: MATHEMATICS

CLASS:  JSS 1

DATE:

TERM: 3rd TERM

REFERENCE TEXTBOOKS

• New General Mathematics, Junior Secondary School Book 1
• Essential Mathematics for Junior Secondary School Book 1

WEEK ONE

TOPIC: Revision

1. Change 321four to base eight (a) 57 (b) 71   (c) 62   (d) 175
2. Simplify in base two (1101)2   (a) 1011011   (b) 10101001   (c) 1101101    (d) 1110111
3. Round off 0.00057891 to 2 s.f  (a) 0.0006   (b) 0.00058  (c) 0.58    (d) 0.000579
4. What is MDLXXVII in Arabic numerals? (a) 1677  (b) 1607  (c) 1577   (d) 1527
5. What is the value of 5 in number 12 752 109? (a) 50 hundreds  (b) 50 thousands (c) 52 thousands  (d) 5 hundredth

1. The product of 25 and 170 is (a) 425    (b) 4250  (c) 4050   (d) 4005
2. There are 805 students in a school. If 409 are boys, how many girls are in this school? (a) 396   (b) 386   (c)  286  (d)  496
3. Express 240 as a product as a product of its prime factors. (a) 23 x 3 x 5   (b)  24 x 3 x 5    (c) 3 x 42 x 5   (d)  42 x 5 x 6
4. The L. C. M of 4, 6 and 8 is (a)  8   (b)  12    (c)  18  (d)  24
5. The H. C. F of 5, 10 and 15 is (a) 10  (b) 15   (c) 5   (d) 30
6. Angle 272o is  (a) an acute angle   (b) an obtuse angle   (c) a right angle  (d)  a reflex angle
7. Which of these fractions is the largest? (a) 35    (b) 56     (c) 58     (d) 23
8. Which of the following is notequivalent to 25  ?  (a) 615    (b) 1050     (c)  2665     (d) 820
9. If 5 38  is expressed as an improper fraction its numerator is (a) 43  (b) 53   (c) 40  (d) 14
10. Simplify: 914 × 715       (a) 1629     (b) 35     (c) 310     (d) 512
11. Work out the answer to 27 ÷112    (a)   37    (b) 421    (c) 17    (d) 514
12. A man’s debt of #35 000 is reduced by ¼ . How much is the debt now? (a) #8 750  (b) # 26 050  (c) #26 250  (d) #16 250
13. Simplify 412  + 234       (a) 614    (b) 714(c) 514    (d) 214
14. Write 15% as a fraction and a decimal. (a) 120 ;0.05 (b) 320 ;1.5  (c) 320 ;0.15 (d) 520 ; 0.25
15. Calculate 0.07 x 0.9   (a) 0.630  (b) 0.063  (c) 6.300 (d) 0.0063
16. Find the cost of 54 exercise books, if 3 exercise books cost #200. (a) #3600 (b) #2600  (c) #1800  (d) #4600
17. If x + 5 = 25 is true, what does x stand for? (a)  40  (b) 35  (c) -7    (d) 7
18. Simplify 15k – 10k + k  (a) 6k  (b) 5k  (c) -6k  (d) 4k
19. Simplify 29 of 36ab     (a) 4ab    (b) 72ab   (c) 8ab    (d) 6ab
20. If x = -2, y = -3 , evaluate 9x2÷ 2y (a) -6    (b) -3   (c) 6  (d) 12
21. What is the coefficient of x in the expression 7 – 9x? (a) 9   (b) 7   (c) -9   (d) -2
22. Simplify x- 6y – (7y- 3x) (a) 12x- 13y  (b) 4x-13y   (c) 2x +13y    (d) 4x-y
23. If x = 3, y = 2 and z = -1, evaluate z( 5x-y)  (a) -13   (b) -10   (c)  15   (d)  14
24. Solve the equation x-54 =3  (a) 12  (b)  17   (c)  7  (d) -7
25. A man weighs 8kg more than his son. If the sum of their weight is 138kg. What is the weight of the man?   (a) 57kg    (b) 73 kg    (c) 77kg    (d) 82kg

SECTION B

Instruction: Answer all the questions in this part

1. Find the estimate and the exact cost of the following:
1. 54 pens at #6.82 each    (b) 214 mangoes at #1.95
1. A woman decides to buy a bed costing #6 950 and a table costing #2 680. (a) By using approximations, estimate the total sum she decides to spend. (b) Calculate the accurate cost
2. Evaluate the following binary numbers: (a) 111 x ( 110 + 101)   (b) 101 x (1000 – 111) (c) ( 1100 -111)2
3. Convert the following to base ten (a) 451eight   (b) 3032four
4. Remove the brackets and simplify the following: (a) ( 8x + 5) + ( 4x – 3) (b) ( 7x + 5y) + (3x – 2y)
5. Solve the following equations: (a) 6m + 2 = 20 + 4m      (b)  9x- 20 = 8 – 5x