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Q III Solve the following and show proper calculations:

a) Find:

i) 17.01 + 136.225 + 13.972

Answer:

Start with the largest number

               136.225

+               17.010 ( you can add zero after decimal point it will not make any difference to the value of 17.01)

+               13.972

--------------------------

               167.207 this is the answer

 

ii) 422.041 -121.378

Answer:

      You deduct smaller number from larger number so we get

                                   4 2 2 . 0 4 1

-                                  1 2 1 . 3 7 8

--------------------------------------------------

                                   3 0 0 . 6 6 3 this is the answer

 

b) Choose the one which is breaking the rule

rule

 

 

 

 

c) Find the product of 2.417 x 6.5

Here there are 3 digits after decimal point in 2.417 and one digit after decimal point in 6.5.

Thus total of 4 digits should come after decimal point in the solution.

so  remove decimal point and simply find the product as follows:

                                 2 4 1 7

x                                     6 5

---------------------------------------

                            1 5 7 1 0 5

Now place decimal point after 4 digits in 157105 we get 15.7105 This is the answer.                                    

 

d) Divide and find the quotient:

              135.63 / 9  

 

9x0 = 0

9x1 = 9

9x2 = 18

9x3 = 27

9x 4 = 36

9x5 = 45

9x 6 = 54

9x 7 = 63

9x 8 = 72

9x 9 = 81

 

    1 5.07

---------------

9 | 135.63

-     9---------------------------------- 9x 1 = 9

--------------

      45    -----------------------------bring down one digit down i.e. 5 

-     45------------------------------9x 5 = 45

--------------

      006-------------------------------bring one digit down i.e. 6

-     000-----------------------------9x 0 = 0

------------

      0063 ---------------------------bring one digit down i.e. 3

-     0063-------------------------------9x 7 = 63

------------

       0000 

 

 

e) Write the place value of each of the numbers of the following number:

12354.607

1 x 10,000-------ten thousand

2 x 1000---------thousand

3 x 100-----------hundred

5 x 10 -----------tens

4 x 1 -------------ones

6/10--------------one - tenth

0/100-------------one - hundredths

7/1000------------one - thousandths