This might sound ridiculous, but it's been so long out of school. What's the proper way to do multiplication in your head, please explain.

12x 7.43 =

Question

This might sound ridiculous, but it's been so long out of school. What's the proper way to do multiplication in your head, please explain. 

12x 7.43 =

photon336 · Answer

well it's going to be hard to do that in your head because of the decimals. best way would be to start with a multiplication table, and work your way up from there.

for example let's start with  1 

anything multiplied by 1 is just itself 

1*1 = 1 
2*1 = 2 
180*1 = 2 

if you multiply a number by 2 it's the same as if you took the same number and added it twice. for example 

2*4 = 8 

4+4 = 8 

8*2 = 16

8+8  = 16

photon336 · Answer

again lol typo's 180*1 = 180

astrophysics · Answer

Just the way you'd it on paper! That could work just as well!

photon336 · Answer

If someone asked me that off the spot I wouldn't be able to give an exact number. i would round 7.43 to 7 and just say 7*12 which is easier.

shadowlegendx · Answer

If you are good at retaining images in your mind and painting on them

|dw:1472172376224:dw|

You could do it that way. Just mentally set it up then start multiplying