30 September 2013

Day 22 / 103 - Card Countdown

We were drilling our subtraction facts today, so we spent a little time playing this game.

Each player started with the number 100 and a deck of cards face down in a pile.  A player would draw the top card from their pile, subtract that value from 100 and record the difference.  They then drew the next card, subtracted that value from the remaining difference and recorded that answer.  We continued to draw cards, subtract, and record answers working as quickly as possible until we reached or went below 0.

This took my children no time at all, so next time we play we're starting with a number higher than 100.

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