Question

01. Solve : 7 + 1 − 9 = 26

02. Without actual addition find the sum of :

1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17

03. Express the number in usual form : 1.001 × 10

04. Subtract 4 − 7 + 3 + 12 from 12 − 9 + 5 − 3

05. Find the cube of 0.02

06. Multiply



with the multiplicative inverse of



07. If 5 is subtracted from twice a number, the result is 15. Find the number.​

Answer 1

Step-by-step explanation:

Let x = the number in question, i.e. the unknown.

twice that number = 2x

when 2x is subtracted from 11 the result is 5. This can be written as 11 - 2x = 5

Now solve for x:

-2x = 5 - 11

-2x = -6

2x = 6

x =3

To check this answer: if you subtract 2 x 3 from 11 do you get 5?

2x3 = 6

11 - 6 = 5 ....check !!

Answer 2

Answer:

Step-by-step explanation:

1. -1 not equal to 26

2. Total consecutive odd numbers = 9

    Thus n = 9

    Therefore sum = n square

    = 9*9 = 81

3. 10.01

4. (12-9+5-3)-(4-7+3+12)

   =5-12

   =-7

5. (0.02)3

    0.02*0.02*0.02=0.000008

7. Let the no. be x.

   2x-5=15

   2x=15-5

   2x=10

   x=10/2

   x=5

Thanks

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