Steps to Success - Subtraction - The Bawburgh School · 2017-06-13 · Steps to Success -...
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Steps to Success - Subtraction Step 1 – Early Learning Children are taught to understand subtraction as taking away (counting back) and finding the difference (counting up) Step 2 - Informal Written Methods Counting on or Counting back? Method A Counting on If the numbers are close together like 203 – 198 it’s quicker to count on. If they’re a long way apart like 203 – 5 it’s quicker to take away. Bead strings or bead bars can be used to illustrate subtraction including bridging through ten by counting back 3 then counting back 2. T0 T0 HT0 - HT0
Transcript of Steps to Success - Subtraction - The Bawburgh School · 2017-06-13 · Steps to Success -...
Steps to Success - Subtraction
Step 1 – Early Learning
Children are taught to understand subtraction as taking away (counting back) and finding the difference (counting up)
Step 2 - Informal Written Methods
Counting on or Counting back?
Method A Counting on If the numbers are close together like 203 – 198 it’s quicker to count on. If they’re a long way apart like 203 – 5 it’s quicker to take away.
Bead strings or bead bars can be used to illustrate subtraction including bridging through ten by counting back 3 then counting back 2.
T0 T0
HT0 - HT0
Steps to Success - Subtraction
Step 2 - Informal Written Methods Continued
Method B Counting back Sometimes I count back because that’s easier than taking away.
Step 3 – Beginning Formal Written Methods
Expanded method working towards decomposition.
HT0 - T0
HT0 - T0
Subtract the ones, tens then hundreds
Steps to Success - Subtraction
Decomposition
Step 4- Using Formal Written Methods Step 3 – Beginning Formal Written Methods Continued
Expanded method working towards decomposition.
HT0 - T0
HT0 - HT0
