We may have some formulas to remember and use.
Even and odd has lost sense. mod 3 and mod 9 will not work any more due to division.
Subtraction is always inverse of addition and may be used as a check.
Every time we divide by 10 and specify a coefficient, a whole lot, an infinite amount in between are skipped.
This is because points have no dimension.
It should be between 0.1666... and 0.125 .
There are conversion formulas among different bases, a number in coded base 2 may be converted to a number in base 10 .
22/7 is almost π which is 3.1416...
1/2 + 5/2 = 3 So the sum should be around 6.14
5.5 / 9 since 1/6 = 3/18 = 3/2 x 1/9. We write it as 11/18
We are trying to drive you to the concept of denseness that you will later learn. We want you to be curious.
Remember this is not a valid check anymore. Just sum all digits and omit any mutiple of 3 at both sides of the equation.
Remember this is not a valid check anymore. Just sum all digits and omit any mutiple of 9 at both sides of the equation.
First came 560 of them . Then another 75 .
The basics must be known by some people in the society and we need to know how to operate machines, must have sense of it.
(7/9+8/9+1)/3 is desired and 1 + 7/9 = 16/9
I is trivial.
II. 11/16 + 2/16 after reductions.
III can not be correct.
1+3+4-7 + 27/41 + 47/123 + 36/82 = (81 + 47 + 54)/123 .
372 x 4/3 = 496 & 4/3 x 45 = 60 .
I is obviously around 5.9
37/9 is approximately 4 and ... which means II is around 7.5 - 8.
427/76 is is around 425/75 = 17/3 and all together around 8.5
These are mixed numbers, calculate first the integer part. Do not be afraid, go on and see.
3/5 + 6/7 = 51/35 which means total fractional part is around 92/35 (little bit less than 3)
4/15 + 3/10 + 1/5 = 23 / 30 .
11/12 + 30/36 = 21/12 with common den. 60
Two fractions a/b and c/d are equivalent (equal) only if the product of the numerator (a) of the first fraction and the denominator (d) of the
other fraction is equal to the product of the denominator (b) of the first fraction and the numerator (c) of the other fraction.
Tree fractions that satisfy the given conditions: 17/15 , 17/16 and 1 .
Set the whole number part aside and find first 17/15 + 17/16 = 527/240 = 2 47/240 .
So the total whole number of the sum is 3 and the proper fractional part is 47/240. These should be divided by 3
Do not disregard the whole part.
Do not get demoralized, it is simple; your self-confidence solves it.
The answer may be a or b.
43/117 is approx. 45/125=9/25=0.36 and 13/11=1.18 less then 1.2 anyway
Just count the elements .
Find first the sum of first 4. Common denominator is 36. Sum is (36+18+9+4)/36 = 67/36
67/36 + 1/25 = (67x25 + 36)/900 = 1711/900
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