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Adding two one/three cups gives yous 2/iii cups. In decimals, 1/3 of a cup is .33 cups, so .33 cups plus .33 cups equals .66 cups. The United States customary cup holds 8 fluid ounces. Since 1/iii or .33 of viii ounces is 2.64 ounces, 2/3 U.S. fluid cups or ane/iii U.S. cups plus 1/3 U.S. cups is equivalent to 5.28 U.South. fluid ounces. The British majestic cup holds 10 imperial ounces. This means that one/3 or .33 of 10 ounces is 3.iii ounces. Thus, 1/3 purple cups plus one/3 royal cups is half-dozen.half dozen ounces.

What Are Fractions?

Fractions are divers equally a part of a whole, written with a peak number chosen a numerator, and a lesser number is chosen the denominator. A division line called a vinculum separates the numerator and denominator in fractions.

Fractions are often presented with a numerator of a lower number than the denominator. However, there are fractions with numerators that are greater than their denominators. Such fractions are called "improper fractions." Improper fractions may exist converted into mixed fractions, which is a whole number accompanied by a fraction, such equally in 1 i/ii.

Adding Fractions

Adding fractions is easy. With fractions that have an identical denominators such as in 1/3 + 1/iii, add the numerators and retain the denominator. Thus 1/3 + 1/3 = two/3. In fractions that don't have an identical denominator, such as in 1/ii + ane/3, multiply the numerators with the denominators of the other fraction, and then add the results which will be your new numerator.

Since multiplying 1×2 gives you 2 and 1×3 gives you 3, calculation 2+3 will requite you 5, which becomes your new numerator. Next, multiply the denominators of the two fractions, and the event will be your new denominator. Thus, 1/2 + 1/3 equals v/six.

Converting Fractions to Decimals

Fractions resemble division formulas because they correspond division. In other words, 1/3 means i÷3, which gives you 0.33. ane/iii cups, therefore, is equivalent to .33 cups and 0.33 cups plus .33 cups equals .66 cups.

Cups in U.Due south. Customary and British Imperial Systems

Both the U.S. customary and British royal organization units of measurements are based on the former English language organisation. While the units measurements for length, weight, altitude, and expanse are identical in both the U.S. customary and regal systems, their units for volume such as fluid ounces, cups, pints, quarts, and gallons differ.

Using the metric system for book equally reference, a U.S. fluid ounce is equivalent to 29.573 milliliters (mL). Since a U.S. fluid cup holds 8 fluid ounces, one U.Due south. cup holds 236.48 mL ― 1/3 or .33 of which is 78.04 mL. This makes 2/3 of a loving cup equivalent to 156.07.

The imperial fluid ounce holds 28.413 ml. Since ane imperial loving cup holds 10 purple fluid ounce, 1 imperial cup is equivalent to 284.13 mL. Using the same calculations every bit above, 1/three of an imperial loving cup is 93.76 mL, and 2/3 of an imperial loving cup is equivalent to 187.52 mL.

The Metric System Cup

Although seldom used, the metric system also has its own version of the cup. One metric arrangement cup measures 250 mL. One-3rd of a metric arrangement cup is 82.5 mL. Therefore, i/three metric arrangement loving cup plus 1/3 metric system cup equals two/3 metric system cups, which is 165 mL.