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Now, we have to see how we can add two numbers given in scientific notation:

2.38 x 10^3 + 4.62 x 10^2

Step 1: First check which has a smaller coefficient and which has larger.

Step 2: make the larger coefficient into equal to the smaller coefficient or vice versa.

Step 3: to make equal we can divide or multiply by 10.

Step 4: If the coefficient is equal we can directly add other numbers and write the final term with the same coefficient with base 10.

2.38 x 10 x 10^2 + 4.62 x 10^2

Or, 23.8 x 10^2 + 4.62 x 10^2

Or, 28.42 x 10^2.

1.345 x 10^5 + 5002.3 x 10^5

5003.645 x 10^5

25 x 10^-6 + 4.5 x 10^-6

29.5 x 10^-6