This is the last time this century that we'll have a date with identical single-digit numbers. (next time is January 1, 2101, if you're keeping score at home!)
A fun activity for the kids today: pick any number you want, and multiply it by 9. Add up the digits in the answer -- they will always be 9 (if the sum is more than 9, add up those numbers too).
It's one of those math tricks you probably learned as a kid, but never think about now.
Let's try it together:
9 x 8 = 72; 7+2 = 9
9 x 47 = 423; 4 + 2 + 3 = 9
9 x 23432 = 210888; 2 + 1 + 0 + 8 + 8 + 8 = 27; 2 + 7 = 9
It always works!
A fun activity for the kids today: pick any number you want, and multiply it by 9. Add up the digits in the answer -- they will always be 9 (if the sum is more than 9, add up those numbers too).
It's one of those math tricks you probably learned as a kid, but never think about now.
Let's try it together:
9 x 8 = 72; 7+2 = 9
9 x 47 = 423; 4 + 2 + 3 = 9
9 x 23432 = 210888; 2 + 1 + 0 + 8 + 8 + 8 = 27; 2 + 7 = 9
It always works!
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