Teaching Presentation: Using place value to add/subtract. ( Year 3 Addition and Subtraction )

This presentation provides five days of teaching that cover the objectives:

• Using place value to add/subtract
  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
Display a place value grid and write 3-digit numbers on it. Show which digit changes if you add multiples of 10. Repeat to show which digit changes if you add multiples of 100. Repeat for 1s.

Day 2 Teaching
Use a place value grid to show which digit changes if you subtract multiples of 10. Repeat for multiples of 100 or 1.

Day 3 Teaching
Demonstrate how to add and subtract near multiples of 10 to/from 2-digit numbers using a number line, and also a 1-100 number grid.

Day 4 Teaching
Use an empty number line to model the hops involved in adding a near multiple of 10 to a 3-digit number: 225 + 29 is 225 hop 30 along and then back 1, etc.

Day 5 Teaching
Use an empty number line to model the hops involved in subtracting a near multiple of 10 from a 3-digit number. Demonstrate how we adjust the hops to subtract 51 or 49 rather than 50.

This teaching is part of Hamilton’s Year 3 Place 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.