Rich tasks for this chapter - page 87

• These are problem solving open-ended questions that require students to investigate adding and subtracting decimals. The tasks can be given at the start of a topic and done as the students gain enough knowledge to complete them, inserted into a topic at an appropriate place, or given as homework, or extension.

1. It's the twins' birthday
2. Decimal puzzles

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Estimating answers to decimal addition and subtraction - page 88

• Estimate the answers to addition and subtraction problems involving decimals.

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Adding decimals using place value - page 90

• Understand how place value can be used to add decimals with tenths.
• Use estimation to check the answers to addition of decimals.

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Subtracting decimals using place value - page 93

• Understand how place value can be used to subtract decimals with tenths.
• Use estimation to check the answers involving subtraction of decimals.

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Adding and subtracting decimals using tidy numbers - page 96

• Use tidy number strategies to add and subtract decimals.
• Use estimation to check the answers involving addition and subtraction of decimals.

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Adding and subtracting decimals using nested place value - page 97

• Use nested place value to add and subtract decimals.

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Adding and subtracting decimals by choosing a strategy - page 98

• Choose an efficient strategy to add and subtract decimals.
• Use estimation to check the answers to problems involving addition and subtraction of decimals.

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