Weight Measurement Examples in Math

Start with the recap, study the fully worked examples, then use the practice problems to check your understanding of Weight Measurement.

This page combines explanation, solved examples, and follow-up practice so you can move from recognition to confident problem-solving in Math.

Concept Recap

Measuring how heavy something is using standard units such as grams, kilograms, ounces, and pounds, by comparing an object's weight against known reference amounts on a balance or scale.

A balance scale is like a seesaw—the heavier side goes down. To find out how heavy something is, add known weights to the other side until the scale balances perfectly.

Read the full concept explanation →

How to Use These Examples

  • Read the first worked example with the solution open so the structure is clear.
  • Try the practice problems before revealing each solution.
  • Use the related concepts and background knowledge badges if you feel stuck.

What to Focus On

Core idea: Weight measurement finds how heavy something is by balancing it against known amounts on a scale, reported in grams, kilograms, ounces, or pounds.

Common stuck point: The procedure for weight measurement is the easy part; the trap is assuming bigger size means more weight. Asking "Am I measuring how heavy something is by balancing it against known weight units?" first is what keeps a correct-looking calculation from being attached to the wrong concept.

Sense of Study hint: Ask: Am I measuring how heavy something is by balancing it against known weight units?

Worked Examples

Example 1

easy
A bag of flour weighs 5 pounds. A bag of sugar weighs 3 pounds. Which is heavier, and by how much?

Answer

Flour is heavier by 2 pounds

First step

1
Compare: 5 pounds vs 3 pounds.

Full solution

  1. 2
    5 > 3, so the flour is heavier.
  2. 3
    Find the difference: 5−3=25 - 3 = 2 pounds.
  3. 4
    The flour is 2 pounds heavier.
To compare weights, subtract the lighter weight from the heavier one to find the difference.

Example 2

medium
A balance scale shows that 1 toy car balances with 6 blocks. If each block weighs 2 ounces, how much does the toy car weigh?

Example 3

medium
A recipe calls for 1.51.5 kg of flour. How many grams is that? If you only have a scale in pounds, how many pounds? (1 kg≈2.205 lb1\text{ kg} \approx 2.205\text{ lb})

Example 4

easy
An elephant and a mouse. Which one is heavier?

Example 5

easy
A puppy and a kitten. The puppy pulls your hand down more. Which is heavier?

Example 6

medium
On a seesaw, one side goes down. Which side has the heavier kid?

Example 7

easy
An apple balances with 5 cubes. A pear balances with 7 cubes. Which fruit is heavier?

Example 8

easy
A crayon balances with 2 paperclips. A marker balances with 8 paperclips. Which is lighter?

Example 9

medium
Three same-size erasers balance with 6 paperclips. How many paperclips does one eraser weigh?

Example 10

easy
A puppy weighs 7 pounds. A kitten weighs 3 pounds. How much heavier is the puppy?

Example 11

easy
A slice of bread weighs about 1 ounce. A whole loaf weighs about 16 ounces. Which is heavier, and by how many ounces?

Example 12

hard
Maya's pumpkin weighs 14 pounds. Ben's pumpkin weighs 9 pounds. Together, how many pounds do the two pumpkins weigh, and whose is heavier?

Example 13

easy
A box of fruit weighs 4242 kg. After Mom takes out some apples, it weighs 2727 kg. How many kilograms of apples did Mom take out?

Example 14

easy
A baby weighs 33 kg 500500 g. How many grams is that in total? (11 kg =1000= 1000 g)

Example 15

hard
Mom buys 22 kg of apples, 11 kg 500500 g of pears, and 750750 g of grapes. What is the total weight in grams?

Practice Problems

Try these problems on your own first, then open the solution to compare your method.

Example 1

easy
A puppy weighs 8 pounds and a kitten weighs 4 pounds. How much do they weigh together?

Example 2

medium
A backpack weighs 9 pounds. After removing some books it weighs 5 pounds. How much did the books weigh?

Example 3

easy
Which unit is best for weighing a single apple: grams or kilograms?

Example 4

easy
A balance scale has a 500500 g weight on the left. To balance it, how many grams must the right side hold?

Example 5

easy
How many grams are in 11 kilogram?

Example 6

easy
A box of crayons weighs 22 kg. How many grams is that?

Example 7

easy
A feather and a brick are the same size in a picture. Which is heavier?

Example 8

easy
A pencil weighs about 55 grams. Would you measure a person's weight in grams or kilograms?

Example 9

easy
On a balance, the left pan goes down and the right pan goes up. Which side is heavier?

Example 10

easy
How many grams are in half a kilogram?

Example 11

medium
A balance holds a 200200 g weight and a 5050 g weight on the left. The right pan holds one block and is balanced. How heavy is the block?

Example 12

medium
A bag of flour is 33 kg. A recipe needs 500500 g. How many grams of flour are in the bag, and is that enough?

Example 13

medium
Two apples weigh 150150 g each. What is their total weight in grams?

Example 14

medium
A scale shows 11 kg 250250 g. How many grams is that in total?

Example 15

medium
A melon weighs 11 kg and an orange weighs 200200 g. How much heavier is the melon, in grams?

Example 16

medium
Three identical books balance a 600600 g weight. How heavy is each book?

Example 17

medium
A truck weighs 22 tonnes. If 11 tonne =1000= 1000 kg, how many kilograms is the truck?

Example 18

medium
A scale reads 750750 g. You add a 300300 g weight. What does the scale read now?

Example 19

challenge
A balance has a 11 kg weight on the left. On the right are 44 identical marbles plus a 200200 g weight, and it balances. How heavy is each marble?

Example 20

challenge
A bag of rice is 22 kg. You scoop out 350350 g three times. How many grams of rice remain?

Example 21

challenge
Four parcels weigh 250250 g, 400400 g, 150150 g, and 11 kg. What is their total weight in kilograms?

Example 22

medium
A scale is in grams. A watermelon reads 35003500 g. How many kilograms is that?

Example 23

easy
A big rock and a tiny pebble. Which one is heavier?

Example 24

easy
A feather and a book. Which one is lighter?

Example 25

easy
A balloon and a brick. Which one is lighter?

Example 26

medium
A bag of toys is hard to lift. A leaf is easy to lift. Which one is heavier?

Example 27

medium
A watermelon and a grape. Which one is lighter?

Example 28

hard
Dad lifts a big box and says 'oof, this is heavy!' Then he lifts a tiny box with one finger. Which box is lighter?

Example 29

easy
A toy car balances with 4 blocks on a balance scale. How many blocks heavy is the car?

Example 30

easy
A pencil balances with 6 paperclips. How many paperclips heavy is the pencil?

Example 31

easy
A spoon balances with 3 marbles. How many marbles heavy is the spoon?

Example 32

medium
A book balances with 9 blocks. A toy car balances with 4 blocks. How many more blocks does the book need than the car?

Example 33

medium
A toy boat balances with 5 cubes. You add 2 more cubes to the cube side. Which side is now heavier?

Example 34

easy
A bag of apples weighs 6 pounds. A bag of grapes weighs 2 pounds. Which is heavier, and by how much?

Example 35

easy
Would you measure a pencil in pounds or ounces?

Example 36

easy
Would you measure a watermelon in ounces or pounds?

Example 37

medium
A backpack weighs 9 pounds when full. A lunchbox weighs 2 pounds. How much do they weigh together?

Example 38

medium
A bag of dog food weighs 15 pounds. A bag of cat food weighs 8 pounds. How much heavier is the dog food?

Example 39

easy
A bag of rice weighs 2525 kg. A bag of flour weighs 1818 kg. How many kilograms do they weigh together?

Example 40

easy
A puppy weighs 44 kg. How many grams is that? (11 kg =1000= 1000 g)

Example 41

easy
Compute the total weight: 3636 kg +47+ 47 kg.

Example 42

medium
A watermelon weighs 55 kg. A pineapple weighs 22 kg 300300 g. How much heavier is the watermelon in grams?

Example 43

medium
A box of books weighs 4848 kg. A second box weighs 2525 kg. A third box weighs 1414 kg. What is the total weight?
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Related Concepts

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Background Knowledge

These ideas may be useful before you work through the harder examples.

countingcomparison