Question

Answer the following questions:
1. A) Find the number from the given expanded form:
8 x 104+ 6 x 10'+ 4 x 102+5 x 10°
B) Solve: 2° x 30 x 6°
C) Solve: (220 - 215) x 2
2. A)If x = 7, find the value of x²-5(x-7)
B) Simplify: 21b-32 + 7b
3. Write the algebraic expression of:
Number 5 added to three times the product of number m and n. Also find
the coefficient of mn.
and
3
4. Write four rational numbers between
32x7² x 118 x 32
5. Solve
21x 11
6. Fill in the box using >, < =.
-8
-
5
7.Show the terms and factors by tree diagram.
6x?y-2 xy + 1. Also write the coefficient of x?
8. Express the following as a product of prime factors only in exponential form:
108 x 56.
9. Solve -
21
-21
10. Solve
bili
65​

Answer 1

Answer:

1)13052. (○=1)

2)30

3)10

2)A)0

b)21b+7b=32

28b=32

b=32/28

b=8/7

3)5+3mn

coefficient mn=3

4)fourth ques is wrong

5)231

6)-8<-5

7)6x. y-2. xy +1

. ^. ^ . ^. ^

. 6 x y. 2*1. x. y. 1

. ^

2×3 x

coefficient=6

x coefficient=0

coefficient=1