Grade 1 · Proportional & Applied Math
Tell and Write Time
Learn to measure and calculate elapsed time through clear explanations, worked examples, an interactive model, and guided practice.
Lesson coverage
Learn the whole topic, not just one problem type.
This lesson and its practice bank deliberately rotate across these core facets so students build a connected understanding of the subject.
Interpret clocks and time notation.
Find duration between two times.
Relate hours, minutes, and seconds.
Find a missing start or end time.
Solve scheduling and duration problems.
Build the idea
Tell and Write Time is part of the develop addition/subtraction strategies, place value to 100, measurement, data, and shape reasoning. Start by identifying what each quantity, symbol, diagram, or graph represents before calculating.
Read time
Interpret clocks and time notation. Use a representation that fits the idea, connect it to the relevant mathematical relationship, and explain how the representation supports the result.
Elapsed time
Find duration between two times. Use a representation that fits the idea, connect it to the relevant mathematical relationship, and explain how the representation supports the result.
Convert units
Relate hours, minutes, and seconds. Use a representation that fits the idea, connect it to the relevant mathematical relationship, and explain how the representation supports the result.
Unknown times
Find a missing start or end time. Use a representation that fits the idea, connect it to the relevant mathematical relationship, and explain how the representation supports the result.
Applications
Solve scheduling and duration problems. Use a representation that fits the idea, connect it to the relevant mathematical relationship, and explain how the representation supports the result.
Use a reliable strategy
Identify the quantities, choose the operation that matches the situation, calculate carefully, and check whether the result is reasonable.
Check and explain
A correct answer is only part of mathematical understanding. Check units, signs, scale, and whether the result makes sense. Then explain the relationship in words so you can recognize the same structure when the numbers or context change.
Key terms
Words to know
- Tell and Write Time
- The central skill or relationship explored in this lesson.
- Elapsed time
- The amount of time between two moments.
- Minute
- A unit equal to 60 seconds.
- Hour
- A unit equal to 60 minutes.
Interactive math lab
Change it. See it. Understand it.
Adjust the values and watch the relationship respond.
| Quantity A | 6 |
|---|---|
| Quantity B | 3 |
| Combined value | 9 |
Worked examples
See the idea in action.
11+10=21 minutes.
2 × 60 = 120 minutes.
Guided practice
20 questions drawn from a 150-question lesson bank.
Each practice session mixes the major skills in this lesson so you practice the whole topic, not just one repeated problem type.
How many minutes are in one hour?
Curriculum reference
Built as a continuous K–12 progression.
The sequence follows widely used K–12 mathematics progressions and references the Common Core mathematics framework. Explanations, examples, interactive models, and practice questions are original FreeLearnHub material.