Unit 2 Math: Ratios, Rates & Percentages

1 millimeter (thickness is about...)

Is about the thickness of a dime

1 centimeter (width is about...)

Is about the width of a pinky finger

1 inch (length is about...)

Is about the length from the tip of your thumb to the first knuckle

1 foot (length is about...)

Is about the length of a football or an actual foot

1 yard (length is about...)

Is about the length of a baseball bat or guitar

1 meter (length is about...)

Is about the length of a baseball bat and ball

1 kilometer (distance is about...)

Is about the distance someone walks in 10 minutes

1 mile (distance is about...)

Is about the distance someone runs in 10 minutes

Units of length from shortest to longest length / distance

millimeter < centimeter < inch < foot < yard < meter < kilometer < mile

Units of length from longest to shortest length / distance

mile > kilometer > meter > yard > foot > inch > centimeter > millimeter

1 milliliter (volume is about...)

Is about the volume of an eyedropper

1 cup (volume is about...)

Is about the volume of a school milk carton

1 quart (volume is about...)

Is about the volume of a large bottle of sports drink

1 liter (volume is about...)

Is about the volume of a reusable water bottle

1 gallon (volume is about...)

Is about the volume of a large milk jug

Units of volume from smallest to largest

milliliter < cup < quart < liter < gallon

Units of volume from largest to smallest

gallon > liter > quart > cup > milliliter

1 gram (mass is about...)

Is about the mass of a raisin

1 ounce (weight is about...)

Is about the weight of a slice of bread

1 pound (weight is about...)

Is about the weight of a loaf of bread

1 kilogram (mass is about...)

Is about the mass of a textbook

1 ton (weight is about...)

Is about the weight of a small car

Units of weight or mass from least to most

gram < ounce < pound < kilogram < ton

Units of weight or mass from most to least

ton > kilogram > pound > ounce > gram

Units of weight from lightest to heaviest

ounce < pound < ton

Units of weight from heaviest to lightest

ton > pound > ounce

Units of mass from lesser to greater

gram < kilogram

Units of mass from greater to lesser

kilogram > gram

U.S. Customary System for weight (used mainly in United States and 2 other countries: Myanmar and Liberia)

- Ounces (oz): Used for very light objects, like a stack of pennies.

- Pounds (lb): Used for things like people and everyday objects.

- Tons (t): Used for very heavy objects, such as cars or a whale.

Metric System for weight (used worldwide)

- Milligrams (mg): Tiny amounts, often used in medicine.

- Grams (g): Small items like jewelry or a small amount of food.

- Kilograms (kg): Used for body mass or household furniture.

- Metric Tonnes (mt): Used for very heavy items like cars, boats, and ships. (This is different from the U.S. "tons")

Difference between "mass" and "weight"

Mass: The amount of matter or "stuff" an object has. It's always the same, no matter where you are.

Example: A bouncy ball has the same mass whether it's in your hand or on the moon.

Weight: The force of gravity pulling on that object's mass. It can change depending on the gravity of the place you're in.

Example: That same bouncy ball weighs less on the moon because there's less gravity there to pull it down.

In simple terms, if you were to take the same bouncy ball to the moon, its mass would stay the same, but its weight would be much lighter.

1 foot = ? inches

12 inches

12 inches = ? feet

1 foot

1 yard = ? feet

3 feet

3 feet = ? yards

1 yard

1 yard = ? inches

36 inches

36 inches = ? yards

1 yard

36 inches = ? feet

3 feet

1 yard = ? feet = ? inches

1 yard = 3 feet = 36 inches

1 mile = ? yards

1,760 yards

1,760 yards = ? miles

1 mile

5,280 feet = ? miles

1 mile

1,760 yards = ? feet

5,280 feet

5,280 feet = ? yards

1,760 yards

1 mile = ? feet

5,280 feet

1 mile = ? yards = ? feet

1 mile = 1,760 yards = 5,280 feet

1 pound = ? ounces

16 ounces

16 ounces = ? pounds

1 pound

1 ton = ? pounds

2000 pounds

2000 pounds = ? tons

1 ton

1 cup = ? fluid ounces

8 fluid ounces

8 fluid ounces = ? cups

1 cup

1 pound = ? kg

~0.45 kg

~0.45 kg - ? lbs

1 pound

1 quart = ? liters

~0.95 liters

~0.95 liters = ? quarts

1 quart

1 meter = ? feet

3.28 feet

3.28 feet = ? meters

1 meter

1 foot = ? meters

0.30 meters

0.3 meters = ? feet

1 feet

1 cubic inch = ? cubic centimeters

16.39 cubic centimeters

1 cubic centimeter = ? cubic inches

0.061 cubic inches

Percent (meaning)

Percent means “per 100.” A percentage is a rate per 100