**Example 1**:

Find the value of 7.3 × 10

^{3}+ 3.2 × 10^{4}and express your answer in standard form.

**Solution**:7.3 × 10

^{3}+ 3.2 × 10^{4}= 7.3 × 10

^{3}+ 3.2 × 10^{1}× 10^{3}= [7.3 + (3.2 × 10

^{1})] × 10^{3}= 39.3 × 10

^{3}**= 3.93 × 10**

^{4}^{ }

^{ }

**Example 2**:

Find the value of 3.3 × 10

^{5}+ 6400 and express your answer in standard form.

**Solution**:= 3.3 × 10

^{5}+ 6.4 × 10^{3}= 3.3 × 10

^{1}× 10^{1}× 10^{3}+ 6.4 × 10^{3}= 330 × 10

^{3}+ 6.4 × 10^{3}= (330 + 6.4) × 10

^{3}= 336.4 × 10

^{3}=

**3.364 × 10**^{5}