Measurement Activities Virginia Standards of Learning Grade 4 SOL 4.10 a, b, c

SOL 4.10 a Estimate conversions between U.S. Customary and metric units, using ballpark comparisons: 1 ounce is about 28 grams; A paper clip weighs about 1 gram An ounce is about the weight of 10 pennies 1 nickel has the mass of about 5 grams; and 1 kilogram is a little more than 2 pounds.

Note to STUDENTS Estimating conversions … Means you will use rounding and number sense to solve measurement problems. Finding estimates means you don’t need the exact numbers.

Estimate conversions between U.S. Customary and metric units, using ballpark comparisons: 1 ounce is about 28 grams 4 ounces is about _____ grams A. 40 B. 80 C.120 D.140 Remember you can round 28 to 30.

If 1 ounce is about 28 grams… 4 ounces is about _____ grams A. 40 B. 80 C.120 D ounce “about” 30 grams 2 ounces60 3 ounces90 4 ounces120 5 ounces150 6ounces180

How can we use the calculator to solve this problem? Estimate conversions between U.S. Customary and metric units, using ballpark comparisons: 1 ounce is about 28 grams 4 ounces is about _____ grams A. 40 B. 80 C.120 D.140 We could multiply the number of ounces by 30. We could multiply 28 times 4 and see which choice fits.

Estimate conversions between U.S. Customary and metric units, using ballpark comparisons: 1 kilogram is a little more than 2 pounds. 3 kilograms is about _____ pounds A. 6 B. 9 C. 10 D. 12 You can use a chart to help you.

Estimate conversions between U.S. Customary and metric units, using ballpark comparisons: 1 kilogram is a little more than 2 pounds. 3 kilograms is about _____ pounds A. 6 B. 9 C. 10 D kg “about” 2 pounds 2 kg4 pounds 3 kg6 pounds 4 kg8 pounds 5 kg10pounds 6 kg12 pounds

Estimate conversions between U.S. Customary and metric units, using ballpark comparisons: 1 kilogram is a little more than 2 pounds. 3 kilograms is about _____ pounds A. 6 B. 9 C. 10 D. 12 How can we use the calculator to solve this problem? We could multiply the number of kilograms by 2.

An apple that weighs two ounces weighs about 60 grams. 1 ounce is about 28 grams.

A bag of potatoes that weighs 5 kilograms is around 10 pounds. 1 kilogram is a little more than 2 pounds.

1 nickel has the mass of about 5 grams 1 ounce is about 28 grams Five nickels weigh a little less than 1 ounce.

Five nickels weigh a little less than 1 ounce. 1 nickel has the mass of about 5 grams 1 ounce is about 28 grams 5 grams

SOL 4.10b Identify equivalent measurements between units within the U.S. Customary system (ounces and pounds) and between units within the metric system (grams and kilograms);

Equivalent Measurements WEIGHT US Customary System ounces & pounds Metric grams & kilograms 1 pound = 16 ounces 1 kilogram = 1,000 grams

Equivalent Measurements WEIGHT US Customary System 1 pound = 16 ounces

1 pound16 ounces 2 pounds32 ounces 3 pounds48 ounces 5 pounds 8 pounds 9 pounds If you know the number of pounds, multiply by 16 to find the ounces. Use your calculator to complete the chart.

1 pound16 ounces 2 pounds32 ounces 4 pounds64 ounces 5 pounds90 ounces 8 pounds128 ounces 9 pounds144 ounces If you know the number of pounds, multiply by 16 to find the ounces.

How would you solve this problem? Melissa’s puppy weighs 3 pounds. What is the puppy’s weight in ounces? Multiply the number of pounds by 16

How would you solve this problem? Melissa’s puppy weighs 3 pounds. What is the puppy’s weight in ounces? 48 ounces

poundsounces If you know the number of ounces, divide by 16 to find the pounds. Use your calculator to complete the chart.

poundsounces If you know the number of ounces, divide by 16 to find the pounds.

How would you solve this problem? Our pet Rex weighs 192 ounces. What is his weight in pounds? Divide the # of ounces by 16.

How would you solve this problem? Our pet Rex weighs 192 ounces. What is his weight in pounds? 12 pounds

Equivalent Measurements WEIGHT METRIC System 1 kilogram = 1,000 grams

Note to STUDENTS Sometimes you will be asked to find a fraction of a unit of measure. Sometimes your answer to measurement problems will be a fraction.

pound is the same as ___ounces There are 16 ounces in a pound. Place 16 objects on your desk in groups of four—since four is our denominator. To find your answer, you would mark one out of every four ounces-just like the fraction says. That is a total of 8. One fourth of a pound is the same as 4 ounces.

pound is the same as ___ounces There are 16 ounces in a pound. Place 16 objects on your desk in groups of two—since two is our denominator. To find your answer, you would mark 1 out of every 2 ounces- just like the fraction says. That is a total of 8. One half of a pound is the same as 8 ounces.

pound is the same as ___ounces There are 16 ounces in a pound. Place 16 objects on your desk in groups of 8—since eight is our denominator. To find your answer, you would mark 7 out of every 8 ounces- - just like the fraction says. What is the answer to our problem?

Let’s Solve These Same Problems

pound is the same as ___ounces A.2 B.3 C.4 D. 10 Set up equivalent fractions to see which numerator will give you equivalent cross-products. Which numerator will make these cross products equal? 1 x 16 is the same as ____ x 4?

pound is the same as ___ounces A.5 B.6 C.7 D. 8 Set up equivalent fractions to see which numerator will give you equivalent cross-products. 1 x 16 is the same as ____ x 2? Which numerator will make these cross products equal?

pound is the same as ___ounces A.14 B.12 C.11 D x 16 is the same as ____ x 8? Set up equivalent fractions to see which numerator will give you equivalent cross-products. Which numerator will make these cross products equal?

Let’s Solve Some Problems Metric Units for Weight

1 Kilogram = 1,000 grams 250 grams is the same as _____ kilograms 1/3 1/4 1/5 1/ ,000 Using the answer choices given, cross multiply to find the Equivalent Fraction

1 Kilogram = 1,000 grams 900 grams is the same as _____ kilograms 9/10 7/8 3/4 2/ ,000 Using the answer choices given, cross multiply to find the Equivalent Fraction

1 Kilogram = 1,000 grams 750 grams is the same as _____ kilograms 750 1,000 Using the answer choices given, cross multiply to find the Equivalent Fraction 2/7 7/8 3/4 2/3