Quickly Multiply together two numbers that are in the 90's.
Example
{% scaleimage l13_example.png float_right %}
Step 1
Find the difference between each number and 100
100 - 97 = 3
{% scaleimage l13_step1.png step1_1 %}
100 - 92 = 8
{% scaleimage l13_step1.png step1_2 %}
Step 2
Add together the numbers from step 1
3 + 8 = 11
Step 3
Subtract the result from step 2 from 100
100 - 11 = 89
Step 4
Multiply together the two numbers from step 1
3 x 8 = 24
Step 5
Put the answer from step 4 behind the answer from step 3
{% scaleimage l13_step5.png %}