Algebra Two Marks Questions

7th Standard EM

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Maths

Time : 00:45:00 Hrs
Total Marks : 30
    15 x 2 = 30
  1. Add:
    (i) 8x, 3x
    (ii) 7mn, 5mn
    (iii) −9y, 11y, 2y

  2. Subtract:
    (i) 4k from 12k
    (ii) 15q from 25q
    (iii) 7xyz from 17xyz.

  3. Find the sum of the following expressions
    (i) 7p + 6q, 5p − q, q + 16p
    (ii) a + 5b + 7c, 2a + 10b + 9c
    (iii) mn + t, 2mn − 2t, − 3t + 3mn
    (iv) u + v, u − v, 2u + 5v, 2u − 5v.
    (v) 5xyz − 3xy, 3zxy − 5yx

  4. Simplify
    (i) (x + y − z) + (3x − 5y + 7z) − (14x + 7y − 6z)
    (ii) p + p + 2 + p + 3 − p − 4 − p − 5 + p + 10
    (iii) n + (m + 1) + (n + 2) + (m + 3) + (n + 4) + (m + 5)

  5. Nine added to thrice a whole number gives 45. Find the number.

  6. Find two consecutive odd numbers whose sum is 200.

  7. Subtract −3ab −8 from 3ab + 8. Also, subtract 3ab + 8 from −3ab −8.

  8. Thrice a number when increased by 5 gives 44. Find the number

  9. Six times a number subtracted from 40 gives −8. Find the number.

  10. From the sum of 5x + 7y − 12 and 3x − 5y + 2, subtract the sum of 2x − 7y − 1 and −6x + 3y + 9.

  11. Find the expression to be added with 5a − 3b + 2c to get a − 4b − 2c?

  12. Write any three expressions each having 4 terms:

  13. Identify the co-efficients of the terms of the following expressions
    (i) 2x-2y
    (ii) x+y+3

  14. Group the like terms together from the following :6x, 6, -5x, - 5, l,x, 6y,y, 7y, 16x, 3

  15. Give the algebraic expressions for the following cases:
    (i) One half of the sum of a and b.
    (ii) Numbers p and q both squared and added

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