whole number

 

 

opas step 1 detail opas step 2 detail opas step 2 detail opas step 3 detail Glossary Action Stories opas step 3 detail opas step 3 detail Glossary Action Stories Glossary Action Stories opas step 4 detail opas step 4 detail Glossary MakeAll Glossary PPW opas step 5 detail Glossary PPW Glossary CountingOn opas step 5 detail Glossary PPW opas step 5 detail opas step 6 detail opas step 6 detail Glossary Counting Back opas step 6 detail Glossary Doubles Near Doubles addition strategy opas step 7 detail opas step 7 detail Glossary Halving