Illustrative Mathematics
Illustrative Mathematics: 5.md Minutes and Days
What time was it 2011 minutes after the beginning of January 1, 2011? This task requires division of multi-digit numbers in the context of changing units and so illustrates 5.NBT.6 and 5.MD.1.
Lawrence Hall of Science
The Math Page: Skill in Arithmetic: Power of Ten
This website from The Math Page explains and defines basic arithmetic terms and place value concepts. There is even a practice section at the very end of the lesson.
Khan Academy
Khan Academy: Multiply Without Regrouping
Multiply 2- or 3-digit numbers by 1-digit numbers. No regrouping or carrying. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Multiplication Without Regrouping
In this exercise, students practice multiplication without regrouping. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Multiplication With Carrying
In this exercise, students practice multiplication with carrying. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Multiply by Taking Out Factors of 10
Multiply numbers like 900 x 1000 Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.