Maths Fractions Decimals Algebric Expression class 7

Simplify

1.  2 z + u + 4, when z = 7 and u = 3	2.   x − z − 7, when x = 3 and z = 7
3.   5 + 4a, when a = 7	4.   7 q z2, when q = 10 and z = 4

Express each phrase as an algebraic expression.

1.   12 more than the quotient of 16 and a number j	2.   10 times the sum of a number q and 49
3.   2 less than the product of 3 and a number r	4.   2 increased by a number z
5.   a fourth of the difference of 38 and a number s	6.   31 multiplied by a number t

Q 22 In the adjoining figure, name the following pairs of angles:

   

(i)     Obtuse vertically opposite angles

(ii)    Adjacent complement angles

(iii)   Equal supplementary angles

(iv)   Unequal supplementary angles

(v)    Adjacent angles that do not form a linear pair.

Short Questions

1.     An angle is greater than 45 . Will its

complement be an angle greater than 45 or equal to 45  or less than 45 ?

2.     State true or false: If measure of an angle is 90° then its supplement angle will be greater than 90°.

3.     State true or false: Two acute angles form a linear pair.

4.     Fill in the blank : If two adjacent angles are complementary they form a ______

5.     How many litres are there in 755 ml ? 

6.     1/3 is the  reciprocal of ______. 

7.     Fill in the blank given below by any one of >, < or = 
 2.005 __ 2.05 

8.     Write an equivalent  fraction of .

9.     A player played 14 games. Out of which he won 8 games. Write the fraction of the games he won

10.                        ___has no reciprocal.

Answer the following

1.     Raghu has 175 sweets out of which he gives one fifth part part to his sister and out of the remaining he gives  two seventh part to his youngest brother. How many sweets are left with him.

2.      

3.