This presentation provides two days of teaching that cover the objectives:
- Subtract 2-digit numbers from numbers over 100 using counting up.
It includes starter activities, whole class teaching, group activities, practice sheets and mastery questions. It can be used on a variety of interactive whiteboards.
Day 1 Teaching
Show a toy frog. Maths Frog helps us with subtraction. He always knows where to start and where to end up. Remind children that Frog hops to the next 10 or 100. Then we add his hops to find the answer. Use Frog to work out 136 – 87, modelling how to draw the steps. Repeat for 143 – 75.
Day 2 Teaching
Children show you on whiteboards how to use Frog to solve 123 – 76. Check that they sketch a line from 76 to 123 and that they hop to the next 10, 100, etc. Write 126 – 73. Do you think this has a bigger or smaller answer? Why? Discuss how the difference between these 2 numbers is bigger. Solve.
This teaching is part of Hamilton’s Year 3 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.
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