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Kid's Page Archive: Free Printable Math Worksheets
Great source for math worksheets on all four whole number operations, fractions, and miscellaneous arithmetic topics. Could be used to assess basic arithmetic skills for areas that need remediation.
Common Core Sheets
Common Core Sheets: Number and Operations in Base Ten 5.nbt.6 Worksheets
Teachers can assess students' knowledge of how to perform operations with multi-digit whole numbers and with decimals to hundredths with these printable worksheets. You can even create your own worksheet or flashcards.
Teaching Treasures Publications
Teaching Treasures: Year Eight Timed Mental Math
This resource provides an interactive worksheet with just ten problems as an independent practice or a quick assessment.