Yes.
2/3
Yes.
19,20,21
Yes, two-thirds is a rational number because it can be expressed as the fraction ( \frac{2}{3} ), where both the numerator (2) and the denominator (3) are integers, and the denominator is not zero. Rational numbers are defined as numbers that can be written as the quotient of two integers, and two-thirds meets this criterion.
All numbers must be expressed in thirds in order to add or subtract them. 3 = 9/3 1 = 3/3 1 2/3 = 3/3 + 2/3 = 5/3 So, 3 - 1 2/3 = 9/3 - 5/3 = 4/3 = 1 1/3
2/3
Yes.
19,20,21
All numbers must be expressed in thirds in order to add or subtract them. 3 = 9/3 1 = 3/3 1 2/3 = 3/3 + 2/3 = 5/3 So, 3 - 1 2/3 = 9/3 - 5/3 = 4/3 = 1 1/3
Yes indeed. That's exactly what "divisible by 3" means.
2/3 is rational. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.
You have to put the slash after the numbers one half is 1/2 three thirds is 3/3
0.6667
There are two ways: one is to start with a multiple of 3 so that the thirds are whole numbers. The second is to write the answer as a rational fraction rather than as a decimal.
There are 9 thirds in 3,
A whole contains 3 thirds. 3 wholes contain 9 thirds (1/3+1/3+1/3)=1 (1/3+1/3+1/3)=1 (1/3+1/3+1/3)=1
3 thirds are in one whole