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First instructable, yay! In this instructable, I will teach you an easy method I created for multiplying numbers between 1 and 100 with relative ease. All I ask ...
The first part of this trick requires two numbers. So, pick any two. The trick works a bit better when at least one number is 10 or more. ...
We can break the equation 19 x 15 down into 19 x (10 + ((1/2) 10))or15 x (20 - 1)Now the first one might seem a little harder, ...
Okay, so we have 15 x (20 - 1) The distributive property states that we can distribute the 15 to the other numbers, meaning we have (15 x ...
15 x 20 is the same as doubling 15 x 10.Since multiplication has the commutative property, it doesn't matter what order we multiply the numbers in. 15 x ...
Say we have 51 x 42.The larger the number, the more complex the math gets, but it's still well within the abilities of a human mind.Your best bet ...
What if we have 99 x 99. It would be rather inefficient to try to multiply a number all the way up to 99.So instead of doing the ...
Don't expect to be doing ridiculously fast mental math on day 1, just practice when you get a chance. If your at the grocery and want to find ...
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