Basic 5Mathematics18 min

Mental Strategy Facts to 81

Learners use known facts, doubling, halving, and distributive thinking during a classroom quiz.

Win the fact quiz with a strategy, not counting one by one.

The class captain asks for quick multiplication and division facts. Learners must explain the strategy they used.

Mental Strategy Facts to 81 illustration

Learners use known facts, doubling, halving, and distributive thinking during a classroom quiz.

Use a strategy for 9 x 6 and 32 x 5.

  1. 9 x 6 is 10 x 6 minus 6, so 60 - 6 = 54.
  2. 32 x 5 is the same as 16 x 10, so the answer is 160.