Year 4 Addition and Subtraction: Written subtraction
This in-depth maths investigation will develop maths meta-skills, and enable children to learn to think mathematically and articulate mathematical ideas.
In-depth Investigation: Hole-y Subtractions
Children create 3-digit palindromic numbers with a ‘hole’ (i.e. a zero) in the middle. They subtract 3-digit numbers with equal numbers of 1s, 10s and 100s and identify patterns in their answers.
This problem-solving investigation is part of our Year 4 Addition and Subtraction block. Each Hamilton maths block contains a complete set of planning and resources to teach a terms worth of objectives for one of the National Curriculum for England’s maths areas.
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Year 4 Addition & Subtraction - Problem-Solving Investigations
These in-depth maths investigations are open-ended problem solving activities for Year 4 children. **In-depth Investigation: Make 100** Given a pattern of four one-digit numbers, children attempt to make a total of exactly 100. **In-depth Investigation: Total £10** Using only digits 1-9 without the ‘5’, children find all possible pairs of amounts to make £10. **In-depth Investigation: Cats and Dogs** Children work to solve a puzzle involving adding two 3-digit numbers. They find several possible solutions, and then invent their own puzzle. **In-depth Investigation: Hole-y Subtractions** Children create 3-digit palindromic numbers with a ‘hole’ (i.e. a zero) in the middle. They subtract 3-digit numbers with equal numbers of 1s, 10s and 100s and identify patterns in their answers. **In-depth Investigation: Present Prices** Children use logic and addition, along with some trial and improvement to solve a problem involving money. **In-depth Investigation: Wonderful 1089!** Children add two 3-digit numbers and subtract a pair of 3-digit numbers to find patterns. They use mathematical reasoning to begin to explain what they find. **In-depth Investigation: Mobile Subtractions** Children select 3 contiguous numbers from a mobile phone display and create a subtraction. **In-depth Investigation: Subtraction Trios** Children look for patterns in answers when subtracting 3-digit numbers from 4-digit numbers with consecutive digits. **In-depth Investigation: Prime Addition Squares** Children add sets of three 3-digit numbers to find patterns in a magic square based on prime numbers. These investigations will develop maths meta-skills, support open-ended questioning and logical reasoning, and enable children to learn to think mathematically and articulate mathematical ideas. These problem-solving investigations come from our [Year 4 Maths Blocks](https://www.hamilton-trust.org.uk/maths/year-4-maths/). Each Hamilton maths block contains a complete set of planning and resources to teach a term’s worth of objectives for one of the National Curriculum for England’s maths areas.
£15.75
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Written subtraction (Year 4 Addition and Subtraction)
This bundle provides five days of teaching that cover the objective: * Written subtraction **Teaching Presentation** The teaching presentation includes starter activities, whole class teaching, group activities, practice sheets and mastery questions. It can be used on a variety of interactive whiteboards. **Practice Worksheets** The procedural fluency practice worksheets are differentiated for children working towards Age Related Expectations (ARE), at ARE and at greater depth. **Problem-Solving Investigation** This in-depth maths investigation will develop maths meta-skills, and enable children to learn to think mathematically and articulate mathematical ideas. **Extra Support** The extra support activity is designed to be used by a teacher or a TA with children who need extra support. This teaching is part of Hamilton’s [Year 4 Addition and Subtraction](https://www.hamilton-trust.org.uk/maths/year-4-maths/addition-and-subtraction/) block. Each Hamilton maths block contains a complete set of planning and resources to teach a term’s worth of objectives for one of the National Curriculum for England’s maths areas.
£9.00
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