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Countdown
You will need:
The Countdown Cards (see page 31), cut into separate number cards.
A one minute timer (this might be using a clock with a second hand, using a timer on a phone or on a website).
A die or a 1-6 spinner.
Instructions:
Put all of the number cards (25, 50, 75, 100 and numbers 1-10) upside down and choose 6 cards.
Roll a die or use the spinner to generate 3 digits. Write these down in the order they are generated, to make a 3-digit number.
Time yourselves for 1 minute – use the six number cards and the operations +, -, × to see how close you can get to the target number.
For example:
Sarah and Diego picked 25, 100, 2, 4, 7 and 1.
Their target number is 836.
This is what Diego calculated:
7 + 1 = 8
8 × 100 = 800
800 + 25 = 825
2 × 4 = 8
825 + 8 = 833
Pupil’s comments
Parent’s comments
I was 3 away from the target number!