Basic Math Examples

$(7.2 \cdot 10^{8}) - (3 \cdot 10^{7})$

Step 1

Multiply $- 1$ by $3$ .

$7.2 \cdot 10^{8} - 3 \cdot 10^{7}$

Step 2

Move the decimal point in $- 3$ to the left by $1$ place and increase the power of $10^{7}$ by $1$ .

$7.2 \cdot 10^{8} - 0.3 \cdot 10^{8}$

Step 3

Factor $10^{8}$ out of $7.2 \cdot 10^{8} - 0.3 \cdot 10^{8}$ .

$(7.2 - 0.3) \cdot 10^{8}$

Step 4

Subtract $0.3$ from $7.2$ .

$6.9 \cdot 10^{8}$

Step 5

The result can be shown in multiple forms.

Scientific Notation:

$6.9 \cdot 10^{8}$

Expanded Form:

$690000000$