Singapore Math: Primary Math Workbook 2A Common Core Edition US Edition which includes chapters on factors

which includes chapters on factors

Common Core Edition covers decimals

The New York Times

This is unit 4D in a four-unit series for fourth grade

and the Pythagorean theorem

Singapore Math: Primary Math Workbook 2A Common Core Edition US Edition which includes chapters on factorsSingapore Math Primary Mathematics: Common Core Edition books have been updated where necessary to align with the CCSS. However, this does not mean that the content has been reduced in its level of difficulty. If CCSS called for content to be introduced at a later level, Singapore Math didn't move content from the earlier level, but rather simply revisits it more in depth at the CCSS level. Singapore Math's Primary Mathematics workbooks are consumable