Adding and Subtracting Decimals
Students will add and subtract decimals to the hundredths using concrete models or drawings and strategies based on place value.
Key Questions
- Explain the importance of aligning decimal points when adding or subtracting decimals.
- Construct a visual model to represent the sum of two decimal numbers.
- Analyze how adding zeros to the end of a decimal can help with subtraction.
Ontario Curriculum Expectations
Suggested Methodologies
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Planning templates for Mathematics
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerMath Unit
Plan a multi-week math unit with conceptual coherence: from building number sense and procedural fluency to applying skills in context and developing mathematical reasoning across a connected sequence of lessons.
rubricMath Rubric
Build a math rubric that assesses problem-solving, mathematical reasoning, and communication alongside procedural accuracy, giving students feedback on how they think, not just whether they got the right answer.
More in Advanced Operations with Decimals
Multiplying Decimals by Whole Numbers
Students will multiply decimals by whole numbers using strategies based on place value and properties of operations.
2 methodologies
Multiplying Decimals by Decimals
Students will multiply decimals by decimals using concrete models or drawings and strategies based on place value.
2 methodologies
Dividing Decimals by Whole Numbers
Students will divide decimals by whole numbers using concrete models or drawings and strategies based on place value.
2 methodologies
Dividing Whole Numbers by Decimals
Students will divide whole numbers by decimals, understanding the concept of making the divisor a whole number.
2 methodologies