Practice multiplying fractions, multiplying a fraction by a whole number, and finding a fraction of a number.
Multiply the numerators together and the denominators together: 2/3 × 4/5 = (2×4)/(3×5) = 8/15.
Divide by the denominator, then multiply by the numerator. 3/4 of 20: 20 ÷ 4 = 5, then 3 × 5 = 15.
Cubles kits are geometry in your hands: nets, faces, edges and vertices that fold and click into a poseable 3D character. No scissors, no glue, about 15 minutes.