Math :) Flashcards
How do you find 10% of a number?
Move the decimal point ONE place value to the left. E.g., 10% of 523 = 52.3
How do you find 1% of a number?
Move the decimal point TWO place values to the left. E.g., 1% of 523 = 5.23
What is the formula for probability?
of desired outcomes/total # of outcomes
What is the percent change formula?
difference/original amount
What is the circumference formula? (circles)
2πr, or πd
r=radius; d=diameter
How many degrees make up a circle?
360 degrees
How many degrees make up a triangle?
180 degrees
How many week are in one year?
52 weeks
How many quarts are in one gallon?
4 quarts
How many pints are in one quart?
2 pints
How many cups are in one pint?
2 cups
How many pounds are in one ton?
2,000 lbs
How many inches are in one foot?
12”
How many feet are in one yard?
3’
How many inches are in one yard?
36”
How many ounces are in one pound?
16oz
Draw the ratio box.
a b Whole \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Ratio (parts) \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Multiply by \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Actual # \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
Draw the average circle
Total
_______________
number X average
Explain or demonstrate the Bowtie Method
1 3 13
– + – = –
3 4 12
- Cross multiply and write the products above each numerator.
- Add (or multiply, or divide, depending on the sign) the two products together
- Multiply the two demonators (ALWAYS multiply the denominators)
What is this fraction in decimal form? In percent form?
1/100
.01
1%
What is this fraction in decimal form? In percent form?
1/5
.2
20%
What is this fraction in decimal form? In percent form?
1/4
.25
25%
What is this fraction in decimal form? In percent form?
2/5
.4
40%
What is this fraction in decimal form? In percent form?
1/2
.5
50%
What is this fraction in decimal form? In percent form?
3/5
.6
60%
What is this fraction in decimal form? In percent form?
2/3
.667
66 and 2/3 %
What is this fraction in decimal form? In percent form?
3/4
.75
75%
What is this fraction in decimal form? In percent form?
4/5
.8
80%
What is this fraction in decimal form? In percent form?
1/3
.333
33 and 1/3%
What is this fraction in decimal form? In percent form?
1/8
.125
12.5%
