Multiply and divide numbers by 10, 100 and 1000 and observe the effect. Lots of choice of level including decimals.
For more multiplication and division resources click here.
KS2 Primary Framework:
Year 3: Multiply one–digit and two–digit numbers by 10 or 100, and describe the effect.
Year 4: Multiply and divide numbers to 1000 by 10 and then 100 (whole-number answers), understanding the effect; relate to scaling up or down.
Year 5: Use understanding of place value to multiply and divide whole numbers and decimals by 10, 100 or 1000.