Question

Solve the following 10 × 2 = 20
1. Give five rational numbers between 4/5 and 3/4.
2. The product of two rational numbers is 15/56. If one of the numbers is −5/ 48, find the other.
3. Multiply 31/6 by the reciprocal of - 5 1/6 .
4. If a = 1/2 , b = 2/3 and c = 5/6 then verify a× ( b + c ) = a × b + a × c
5. Find 2/5 × - 3/7 - 1/14 - 3/7 × 3/5 using suitable property
.
6. Represent -5/7, - (3 )/7, 1/7 , 4/7 on a number line.

7.The sum of two rational numbers is 7 4/11 . One number is 8 3/5 . Find the other number.

8. Find 3/7 +(- 6/11 )+(- 8/21 )+ 5/22

9.The area of a rectangle is 8 2/3 sq.cm and its length is 4 1/3 cm . Find its breadth.

10. If a = - 2/3, b = 3/5, c = - 5/(6 ) then verify that a + ( b + c ) = ( a + b ) + c

Answer 1

Answer:

1. Addition of hydrogen in a substance in a reaction is known as___________ reaction.

2. In a ________ reaction two or more substances combine to form a new single substance.

3. Unbalanced reactions are also known as _________

4. Reactions in which heat is given out along with the products are called _________- reactions.

5. Reactions in which energy is absorbed are known as _________ reactions.

6. When as element displaces another element from its compound, a ________ reaction occurs.

7. Those reactions, in which two compounds react by an exchange of ions to form two new compounds, are called ________ reactions

8. Precipitation reactions produce __________ salts.

9. Reduction is the _________ of oxygen or gain of hydrogen.

10. The digestion of food in the body is an example of ____________ reaction.

11. The addition of oxygen to a substance is called __________.

12. When calcium carbonate is heated, it decomposes to give___________ and

Answer 2

Answer:

acc to me your answer is 1/2, 1/3, 1/4, 1/5 mark me as brainlest