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For me, it would be much easier to multiply 36 x 100 then divide that (3600) in half (1800) and add 2x36 (or 72) to it.

We all think in different ways, and learn in different ways, so being open to a lot of ways to do these problems makes it more certain that you will have a better acceptance of at least ONE methodology presented.

_{246}) then add a 0 on the end to get 2460 then subtract a 41 to get 2419 :-)There are several ways to do it....

you need to actually say "add two zeros to your second number, THEN add the first." Using your example, i tried 10x11 and it didn't work right. I added 2 zeros and it worked just fine.

Just something to make your math completely fool-proof.

Not being a jerk here, just helping.

good trick though.