Make 13 with the numicon. Place the 4 plate on top and see what you have got left. Use the 9 plate to check. Column Use Base 10 to make the bigger Draw the Base 10 or place value counters alongside the number then take the smaller number written calculation to help to show working. This will lead to a clear method away. written column subtraction. without regrouping Show how you partition numbers to subtract. Again make the larger number first. Column Using Numicon Exchange When confident, children can find their own way to record method with Use Base 10 to start with before moving the exchange/regrouping. regrouping on to place value counters. Start with Just writing the numbers as shown here shows that the one exchange before moving onto child understands the method and knows when to subtractions with 2 exchanges. See exchange/regroup. Diagram opposite. Children can start their Make the larger number with the formal written method by value counters partitioning the number into Start with the ones, can I take away 8 clear place value columns. from 4 easily? I need to exchange one of my tens for ten ones. Now I can subtract my ones. Then move over to the tens. Moving forward the children use a more compact method. Show children how the concrete method links to the written method alongside your working. Cross out the numbers when exchanging and show where we write our new amount.
Make 13 with the numicon. Place the 4 plate on top and see what you have got left. Use the 9 plate to check. Column method without regrouping Use Base 10 to make the bigger number then take the smaller number away. Show how you partition numbers to subtract. Again make the larger number first. Draw the Base 10 or place value counters alongside the written calculation to help to show working. This will lead to a clear written column subtraction. Column method with regrouping Using Numicon Exchange Use Base 10 to start with before moving on to place value counters. Start with one exchange before moving onto subtractions with 2 exchanges. See Diagram opposite. Make the larger number with the value counters Start with the ones, can I take away 8 from 4 easily? I need to exchange one of my tens for ten ones. Now I can subtract my ones. Then move over to the tens. Show children how the concrete method links to the written method alongside your working. Cross out the numbers when exchanging and show where we write our new amount. When confident, children can find their own way to record the exchange/regrouping. Just writing the numbers as shown here shows that the child understands the method and knows when to exchange/regroup. Children can start their formal written method by partitioning the number into clear place value columns. Moving forward the children use a more compact method.
Calculation_Policy_Updated.docx