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Important Questions for Class 7 Maths expressions using letternumbers

In this page we have Important Questions for Class 6 Maths algebra . Hope you like them and do not forget to like , social share and comment at the end of the page.

Question 1 Give expressions for the following cases.
(a) 71 added to m
(b) 99 subtracted from m
(c) n multiplied by 8
(d) p divided by 10
(e) 11 subtracted from − x (f) − y multiplied by 1
(g) − x divided by 11
(h) z multiplied by – 5

Answer

(a)$m+71$
(b)$m-99$
(c) $8n$
(d) $\frac {p}{10}$
(e) $-x-11$
(f) $-y$
(g) $\frac {-x}{11}$
(h)$-5z$
(i) $2z-11$

Question 2
Which out of the following are expressions with both variable and numbers only?
(a) $p -9$
(b) $(11 \times 20) - 8x$
(c) $5 (21 - 7) + 7 \times 2+p$
(d) $1$
(e) $11x-1$ (f) $5 +4+3+2+1$
(g) $(7 \times 8) - (8 \times 7) - 45 +11x$
(i) $2z-11$

Answer

Both number and variable expression are a,b,c,e,g

Question 3
Get the algebraic expressions in the following cases using variables, constants and arithmetic operations.
(i) Subtraction of z from y.
(ii) One-half of the sum of numbers a and b.
(iii) The number y multiplied by itself.
(iv) One-Eighted of the product of numbers x and y.
(v) Numbers p , q and r both squared and added.
(vi) Number 5 added to three times the product of number m and n.
(vii) Product of numbers y and z subtracted from 10.
(viii)Sum of numbers x and y subtracted from their product.

Answer

(i) $y-z$
(ii) $\frac {1}{2}(a+b)$
(iii)$y^2$
(iv) $\frac {xy}{8}$
(v)$p^2 + q^2 +r^2$
(vi)$3mn+5$
(vii) $10-yz$
(viii) $xy -(x+y)$

Question 4
(a) Complete the table and by inspection of the table, find the solution to the equation x -11 = 6
Important Questions for Class 6 Maths algebra