Grade 1
  1. Numbers and Counting  1.1. Counting to 10  1.2. Counting to 20  1.3. Counting to 50  1.4. Counting to 100  1.5. Writing Numbers 1 to 10  1.6. Writing Numbers 1 to 20  1.7. Writing Numbers 1 to 50  1.8. Writing Numbers 1 to 100  1.9. Reading Numbers 1 to 10  1.10. Reading Numbers 1 to 20  1.11. Reading Numbers 1 to 50  1.12. Reading Numbers 1 to 100  1.13. Comparing Numbers  1.14. Ordering Numbers  1.15. Odd and Even Numbers  1.16. Number Patterns  1.17. Skip Counting by 2s, 5s, and 10s  1.18. Understanding Zero
  2. Basic Addition and Subtraction  2.1. Understanding Addition  2.2. Addition Facts within 10  2.3. Addition Facts within 20  2.4. Adding Zero  2.5. Adding One More  2.6. Adding Two More  2.7. Adding Three More  2.8. Adding Using Pictures  2.9. Addition Word Problems  2.10. Understanding Subtraction  2.11. Subtraction Facts within 10  2.12. Subtraction Facts within 20  2.13. Subtracting Zero  2.14. Subtracting One  2.15. Subtracting Two  2.16. Subtraction Using Pictures  2.17. Subtraction Word Problems  2.18. Introduction to Doubles Facts  2.19. Introduction to Making 10
  3. Place Value and Number Sense  3.1. Understanding Tens and Ones  3.2. Counting by Tens  3.3. Place Value within 20  3.4. Place Value within 50  3.5. Place Value within 100  3.6. Reading and Writing Two-Digit Numbers  3.7. Comparing Two-Digit Numbers  3.8. Decomposing Numbers
  4. Measurement  4.1. Length  4.1.1. Comparing Lengths  4.1.2. Measuring with Non-Standard Units  4.1.3. Using Standard Units (Inches and Centimeters) in Length  4.2. Weight  4.2.1. Comparing Weights  4.2.2. Heavy and Light Objects  4.2.3. Introduction to Grams and Pounds  4.3. Capacity  4.3.1. Comparing Capacity  4.3.2. Full and Empty  4.3.3. Introduction to Liters and Milliliters  4.4. Time  4.4.1. Telling Time to the Hour  4.4.2. Telling Time to the Half Hour  4.4.3. Days of the Week  4.4.4. Months of the Year  4.4.5. Understanding Yesterday, Today, and Tomorrow  4.5. Money  4.5.1. Recognizing Coins  4.5.2. Counting Coins  4.5.3. Introduction to Dollar and Cents Symbols  4.5.4. Simple Addition and Subtraction with Money
  5. Geometry  5.1. 2D Shapes  5.1.1. Recognizing 2D Shapes  5.1.2. Drawing 2D Shapes  5.1.3. Naming 2D Shapes  5.1.4. Properties of 2D Shapes  5.1.5. Sorting 2D Shapes  5.1.6. Composing Simple Shapes  5.2. 3D Shapes  5.2.1. Recognizing 3D Shapes  5.2.2. Naming 3D Shapes  5.2.3. Properties of 3D Shapes  5.2.4. Sorting 3D Shapes  5.3. Position and Direction  5.3.1. Left and Right  5.3.2. Above and Below  5.3.3. Inside and Outside  5.3.4. Near and Far  5.3.5. In Front and Behind
  6. Patterns and Sorting  6.1. Recognizing Patterns  6.2. Extending Patterns  6.3. Creating Patterns  6.4. Sorting by Color  6.5. Sorting by Shape  6.6. Sorting by Size
  7. Data and Graphing  7.1. Introduction to Data  7.2. Collecting Data  7.3. Tally Marks  7.4. Bar Graphs  7.5. Picture Graphs  7.6. Interpreting Simple Graphs
  8. Fractions  8.1. Understanding Halves  8.2. Understanding Fourths  8.3. Dividing Shapes into Equal Parts  8.4. Identifying Equal and Unequal Parts

Grade 1 → Measurement → Weight ↓


Introduction to Grams and Pounds


In this lesson, we'll learn about weighing things. We use weights every day. When we go to the store, when we're baking with our parents, or when we're holding our favorite toy, we're talking about weight. Today, we'll learn about two units used to measure weight: grams and pounds.

Understanding weight

Weight tells us how heavy something is. Just as we use a ruler to measure the length or height of something, we use a scale to measure how heavy something is. There are different units for measuring weight. Two common units are grams and pounds.

What are grams?

Grams are a unit of weight that is mostly used in the metric system. The metric system is easy to understand because it is based on the number ten. Think about holding a feather. A feather doesn't weigh much. We say it weighs just a few grams. Small things, such as paper clips or a few grains of rice, are also measured in grams.

1 gram (g) = very light, like a small feather

Use of grams

Suppose you have three small apples. Each apple weighs about 100 grams. So, if you have three apples, the total weight is:

3 apples × 100 grams each = 300 grams

The more apples you have, the more grams you will have.

Let us understand this with an example:

100 grams 100 grams 100 grams , 300 grams

What are pounds?

Pounds are another unit of weight. You may have heard your parents say that something weighs a certain number of pounds. Pounds are mainly used in the traditional system, which is common in places like the United States.

Think about holding a bag of sugar or flour. These things are heavier than some feathers. We use pounds to measure the weight of these things.

1 pound (lb) = about the weight of a loaf of bread

Use of the pound

Suppose you have two large books. Each book weighs about 1 pound. So, if you lift both books, their total weight will be:

2 books × 1 pound each = 2 pounds

It might help to look at it in this example:

1 pound 1 pound , 2 lbs

Comparison of grams and pounds

Let's compare grams and pounds. Grams are a smaller unit than pounds.

1 ounce (about 28 grams) helps us understand pounds. For example, one pound is about 453.6 grams. This makes pounds heavier than grams.

1 pound = 453.6 grams

If you have a toy that weighs 500 grams, that's a little over 1 pound:

500 grams > 1 pound

However, if you have 300 grams of marbles, that would be less than a pound:

300 grams < 1 pound

Everyday examples

Example with grams

Think of a sandwich. A sandwich can weigh about 200 grams. If you have two sandwiches, you have:

2 sandwiches × 200 grams each = 400 grams

Imagine this example:

200 grams 200 grams , 400 grams

Example with pounds

Imagine you are carrying a backpack. If your backpack contains lunch and books, it may weigh 5 pounds. If you also add a water bottle weighing 1 pound, the total weight will be:

5 pounds + 1 pound = 6 pounds

Imagine this example:

5 lbs 1 pound , = 6 pounds

Conclusion

We use units like grams and pounds to measure weight every day. Grams are used for lighter objects, while pounds are used for heavier objects. Now you know more about measuring weight and comparing different units!


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Introduction to Grams and Pounds

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