Measurement
3rd Grade Math Resources for families
Big Ideas
Big Ideas
Determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems
Solve problems involving addition and subtraction of time intervals in minutes using pictorial models or tools such as a 15-minute event plus a 30-minute event equals 45 minutes
Determine when it is appropriate to use measurements of liquid volume (capacity) or weight, as well as the appropriate units and tools used to measure
Determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems
Determine the perimeter of a polygon or a missing length when given perimeter and remaining side lengths in problems
- With your child, use a tape measure to practice measuring the perimeters of objects at home such as a tabletop or desktop, the floor of a small room, or a toy box. Talk about what units are best for measuring different perimeters (e.g., inches to measure a toy box, feet to measure the floor in a room).
- Give your child a tape measure and ask him to find the area and perimeter of the surfaces of objects around the house, such as the top of a desk or table, a computer or TV screen, a cupboard door, a cookie sheet, a window, or a door. Make sure that each of the chosen objects has a rectangular surface. Ask your child to record his findings and talk about which objects have the largest and smallest area and perimeter measurements.
Perimeter
Perimeter Shape Shoot
Measuring Perimeter
Perimeter and Area Practice
Solve problems involving addition and subtraction of time intervals in minutes using pictorial models or tools such as a 15-minute event plus a 30-minute event equals 45 minutes
Solve problems involving addition and subtraction of time intervals in minutes using pictorial models or tools such as a 15-minute event plus a 30-minute event equals 45 minutes
- Encourage your child to practice skip-counting forward and backward by fives (e.g., 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 45, 40, 35, 30, 25, 20, 15, 10, 5, 0).
- Ask your child to tell the time to the nearest minute using a non-digital watch or an analog clock. Play with the clock or watch hands to create different times to tell.
- Record the time your child starts an activity, such as setting the table for dinner or reading, and record the ending time. Ask your child to figure out how many minutes the activity lasted.
How-To: Elapsed Time
Tiempo previo
Game: Find the Start Time
Adding Time Word Problems
Determine when it is appropriate to use measurements of liquid volume (capacity) or weight, as well as the appropriate units and tools used to measure
Determine when it is appropriate to use measurements of liquid volume (capacity) or weight, as well as the appropriate units and tools used to measure
- Collect some measuring cups, pint and quart measuring containers if available, and some unmarked containers, such as pots, pans, pitchers, and glasses. Fill the unmarked containers with random amounts of water. Have your child guess how much water is in each container. Then, use the measuring cups or containers to check the accuracy of the predictions.
- Get a bathroom scale and a group of ordinary household objects, such as a book, a small wastebasket, a box of detergent, and a boot. Have your child predict how much each object weighs, and then use the scale to check the predictions.
How-To: Relative Measurement
Measurement Tools
Ounce or Pound?
