Khan Academy
Khan Academy: Find Missing Divisors and Dividends (1 Digit Division)
Find missing divisors and dividends in 1-digit division problems. Quotients are less than or equal to 10. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video tutorial, or receive hints....
Illustrative Mathematics
Illustrative Mathematics: 3.oa Finding the Unknown in a Division Equation
This task shows an equation that elicits key misconceptions around equations and division. Aligns with 3.OA.A.4 and CCSS.Math.Content.3.OA.A.4 Determine the unknown whole number in a multiplication or division