Like if I told you what's 27 * 37 and gave you 2 minutes can you do it without pencil & paper?
2007-12-05 08:12:14 · 8 answers · asked by Adel 6 in Science & Mathematics ➔ Mathematics
yes I usually just break them down a little
like 37 *20 = 740
and 37*7=259
=999
that works pretty well for me
2007-12-05 08:17:26 · answer #1 · answered by golffan137 3 · 2⤊ 0⤋
Well, let's see ... nope, I was way off! :-S
Duh! I should have remembered to break it down, like "gulffan" said, to 27 * 30 & 27 * 7, but I was trying to do it without looking at the other answers first.
2007-12-07 01:11:34 · answer #2 · answered by Phoebe 5 · 0⤊ 0⤋
Yes, I probably could. I would probably use the distributive property, and I that didn't work, just try to do what i usually do on paper in my head.
2007-12-05 08:16:10 · answer #3 · answered by Anonymous · 1⤊ 0⤋
In 2 minutes yes...plenty of time.
2007-12-08 04:04:48 · answer #4 · answered by Isabella's Mommy Expecting #2 6 · 0⤊ 0⤋
It gets complicated sometimes, but 2 mins is enough!
2007-12-05 08:17:27 · answer #5 · answered by Anonymous · 1⤊ 0⤋
uh no. anything I can do with a calculator, I can't do in my head.
Unless it's any number times 10.
2007-12-05 08:29:13 · answer #6 · answered by ♥Celebrity Hotline♥ (Thumbs up!) 7 · 0⤊ 0⤋
yes I probably could. the answer is 999
2007-12-05 08:57:42 · answer #7 · answered by Dave aka Spider Monkey 7 · 1⤊ 0⤋
adding yes~multiplying no~
2007-12-05 14:31:27 · answer #8 · answered by Mary S 6 · 0⤊ 0⤋