Flash math

Sharpen subtraction skills with this technique teachers love.

You'll Need

  • Index cards
  • Pen or pencil

Learning Stages

Ask your child to make a flash card set with you. On the unlined side of the cards, write addition equations using math facts to 20. On the lined side of the card, ask your child to write the inverse subtraction fact. For example, if you write 15 + 3 = 18, then your child will write 18 – 15 = 3.

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