Ok, first off, don't worry. If you think to yourself 'I can't do this,' then you won't be able to. Basically it sounds like you have to break the problems down into smaller steps, and write them all down.
So for 86 x7 you need to times the 7 by the tens and the units of the other number separately.
Tens = 80
Units = 6
You would need to write 80 x 7 (which is 8 x 7 with a 0 at the end: 8x7=56, so 560
6 x 7 = 42
Add both the parts together
560+42 (if you find adding difficult, break that down as well ) 560 + 40 = 600
600 + 2 = 602
So, 86 x 7 = 602
If you have problems that involve mulitplying 2 two digit numbers you break both down. So, for example:
70x80 (7x8 plus 2 zeros)
70x6 (7x6 plus 1 zero)
4x80(4x8 plus 1 zero)
Then add all the answers together and that's the final answer.
i'm not good with math either. here's just my oponion.
I say just do the math. Call some friends to help you out. Might as well just finish the assignments and turn it in rather than getting an F for that class. :D
submit your math question and ill walk you through it
What is your math problem?
Okay I would really like to help but I don't know this particular question. Why don't you get help from the math experts. Try http://www.tuitionplaza.com/tutoring/hom... - homework help by retired teachers and volunteers (free)
the answer is long multiplication.
you multiply the units by 3 then the tens by 3 and add the answers for example 11x3=33. 1x3=3 10x3=30 30+3=33. your first example 87x3 3x7=21 3x80=240 so 240+21=261.
The trick is that you only need to know your times tables by heart to times 10. As to multiply by a factor of ten you just add a 0, by 100, add 00 etc, in the example 3x80, ignore the 0 to give you single figures to work with then just put it back on at the end. 3x8=24 because it was 3x80 add a 0 on to the end and you have 240. hope that helps.
This article contents is post by this website user, EduQnA.com doesn't promise its accuracy.
More Questions & Answers...