en.m.wikipedia.org/wiki/Focal_ratio

Standard full-stop f-number scale. Typical one-half-stop f-number scale. Typical
one-third-stop f-number scale. Typical one-quarter-stop f-number scale. H-stop.

www.brainbashers.com/showanswer.asp?ref=ZDFT

What number is two-thirds of one-half of one-fourth of 240? [Ref: ZDFT]. Answer:
20. One-fourth of 240 is 60. One-half of 60 is 30. Two-thirds of 30 is 20.

www.themathpage.com/arith/percent-of-a-number.htm

What is more, from 1% we can calculate 2%, 3%, and so on. While from 10% we
can ... is two eighths. Therefore, three eighths will be one quarter plus half of one
quarter: $150 + $75 = $225. .... is 240. Therefore two thirds are 2 × 240 = 480.

www.abelard.org/sums/teaching_number_arithmetic_mathematics_fractions_decimals_percentages1.php

how to teach a person number, arithmetic, mathematics, on teaching reading ....
one minus three quarters equals one quarter : 1 - 3/4 = 1/4 ... As you can see, one
third of one is equivalent to two sixths, and one half is equivalent to three sixths.
.... and deal in 240ths, but this way we only have to deal in 60ths (2 x 2 x 3 x 5).

www.homeschoolmath.net/teaching/f/multiplying_fractions_2.php

We have studied how to find a fractional part of a whole number using
multiplication. For example,. 3. 5. of 80 is written as a multiplication: 3. 5. × 80 =
240. 5. = 48. ... One-half of, is . ... One-fourth of, is . ... share equally with one, two,
or three other people. Write a .... Now Ted has completed a third of what was still
lef...

www.mathmistakes.info/facts/TrigFacts/learn/uc/nar.html

and Math Facts Students Should Know, logo240 ... One quarter of a revolution (a
right angle) equals 2π/4 = π/2 radians. ... One eighth of a revolution is the angle
that divides the first quadrant in half; it is half a right angle: ... The angles one third
and two thirds of the way through the second, third and fourth quadrants are π/2 ...

www.answers.com/Q/What_is_one_fourth_of_two_thirds

What is two thirds of one half of one fourth of 240? Answer: 20 1/4 or 240 is 60
and one half of 60 is 30 and 2/3 of 30 is 60/3 or 20 .... Dividing a mixed number (1
2/3) by a fraction (3/4): First convert any mixed numbers to fractions: (1 2/3) is ...

www.answers.com/Q/What_is_one_half_of_three_and_two_thirds

11/6 .... What is two thirds of one half of one fourth of 240? ... it as a common
denominator you can now add the top numbers and then simplify your answer.

www.answers.com/Q/What_is_2_thirds_of_240

2/3 of 240 = 2/3 x 240 = 2x240/3 = 160 . ... To put a number into thirds, simply
divide it by 3. 4 people found ... What is two thirds of one half of one fourth of 240
?

www.counton.org/resources/numeracy/pdfs/y456str1.pdf

digit, one-digit number, two-digit number, three-digit number, four-digit number…
... four thousand, one hundred and sixty-seven… ..... ordinal numbers: first,
second, third, fourth… 1st, 2nd, 3rd ... Indicate on a number line what number is
half way between: 740 and ... If 16 240 ss 16 320, what numbers could ss be?
See also ...