Question

Arrange the steps to perform this subtraction operation in the correct order.

Answer 1

Answer:

=1.23*10^6

Step-by-step explanation:

We have to calculate

(1.93*10^7 )-(9.7*10^6)

In order to add or subtract two numbers in scientific notation, we have to make sure that the power of exponents in both numbers is same.

We have to reduce the power of 10 in first number from 7 to 6

So,  

Step 1:

1.93*10^7=1.93*10*10^6

=10.93*10^6

Now,

Step 2:

=(1.93*10^7 )-(9.7*10^6 )

= 10.93*10^6- 9.7*10^6

Step 3:

=(10.93-9.7)*10^6

=1.23*10^6

Answer 2

Answer with explanation:

W have to find the value of :

   $[A=1.93 \times 10^7] - [B=9.7 \times 10^6]$

Here exponent of 10 differs in both of these terms. So, to find the difference of A and B, we should make exponent of 10 equal in both the terms.

Exponent of A is Higher,so we will try to make this equal to exponent of 10 in B.

$A=1.93 \times 10^7\\\\A=19.3 \times 10^6\\\\A-B=19.3 \times 10^6-9.7 \times 10^6\\\\=(19.3-9.7) \times 10^6\\\\=9.6\times 10^6$