Determine the unknown whole number in a multiplication or division equation relating three whole numbers.
3.OA.B.6
Understand division as an unknown-factor problem.
3.OA.C.7
Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g. Knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of grade 3, know from memory all products of two one-digit numbers.