9th grade math

posted by .

How does 3 and5/8 minus1 and3/4 equal1 and3/4

  • 9th grade math -

    3 5/8 - 1 3/4
    To do this, first we convert the mixed numbers to improper fractions. To convert we multiply the denominator (the number under the line) by the constant then add this answer to the numerator (number above the line), while retaining the denominator. Doing this,
    3 5/8 = ((8 x 3) + 5) / 8 = (24 + 5)/8 = 29/8
    1 3/4 = ((4 x 1) + 3) / 4 = (4 + 3)/4 = 7/4
    Rewriting the expression,
    29/8 - 7/4
    Note that we cannot perform addition or subtraction operation when the denominators are not equal. Thus we find the LCD (least common denominator). The LCD is 8. We convert the fractions into fractions with 8 as the denominator. For the first term, the denominator is already 8, while for the second term, we divide 8 by 4 and multiply this by the numerator:
    29/8 - 14/8
    15/8 or 1 7/8

    hope this helps~ :)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. 9th Grade Courses

    For 9th grade science, which would be easier to take?
  2. 9th grade

    I'm doing this word search for my 9th grade honors physical science class, and i don't understand one thing. it says 'blue, striped and round are examples of this' when we're talking about matter and phases of matter and density/mass/weight/volume. …
  3. math

    a rectangle with sides 6.5 km and3.4km
  4. trig

    In a right triangle the hypotenuse has length 10 and the the sum of the cotangents of all three angles of the triangle equals 2. What are the lengths of the other two sides of the triangle?
  5. math

    the volume of a container that is 8" long 4" long and3' high is _cu in. please help
  6. physics

    A charge of 8 pC is uniformly distributed throughout the volume between concentric spherical surfaces having radii of 1.7 cm and3.7 cm. What is the magnitude of the electric field 2.6 cm from the center of the surfaces?
  7. 9th grade math

    How does 3 and5/8 minus1 and3/4 equal1 and3/4
  8. 9th grade math

    How does 3 and5/8 minus1 and3/4 equal1 and3/4
  9. math

    Riding on a school bus are 20 students in 9th grade, 10 in 10th grade, 9 in 11th grade, and 7 in 12th grade. Approximately what percentage of the students on the bus are in 9th grade?
  10. math

    For what value of n, are the nth terms of two APs: 63,65,67,...and3,10,17,...equal?

More Similar Questions