They aren't. The rules are the same as those for adding/subtracting or multiplying integers. Just be careful of the decimal point's location.
9
9
Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
Doubling is the same as multiplying by two. The two actions are the same.
2. multiplying 2 and 2 is the same as adding 2 and 2.
yes
They aren't. The rules are the same as those for adding/subtracting or multiplying integers. Just be careful of the decimal point's location.
multiplying. adding is permeter. sorry bout my spelling. not the best at it
Same as adding, multiplying, and dividing.
9
9
Multiplying by two is the same thing as adding the number to itsself again. 2 (4) = 4 + 4
Doubling is the same as multiplying by two. The two actions are the same.
Adding and subtracting fractions can ONLY be done if the denominators are the same; then the calculation is done by adding or subtracting the numerators. Multiplying (and dividing) fractions does not require the denominators to be the same. To divide by a fraction the divisor is inverted (the original numerator becomes the new denominator and the original denominator becomes the new numerator) and then the fractions are multiplied. Multiplying fractions is achieved by multiplying the numerators together AND multiplying the denominators together. A whole number is the same as a fraction with the whole number as the numerator and a denominator of 1, so when multiplying by a whole number the denominator is multiplied by 1 (leaving it the same) and the is multiplication is effectively just multiplying the numerator by the whole number.
multiplying
That's the distributive property.