I learned short multipacation. Short multipacation is a short version for multiplying big numbers. There is a zero that  you use to multiply by ten. I also learned that if you multiply a number by ten or one-hundred you just put the zeros on. Another thing I learned was long division it is also used for bigger numbers. There is six steps to long division divide, multiply, subtract, compare, bring down and repeat. You can check your answer by multiplying. Angles is another thing I learned an acute angle is less than ninety degrees, an obtuse angle is more than ninety degrees, a right angle is equal to  than ninety degrees. This year I learned volume you can figure out volume by multiplying length times width times height. You will usually do volume with 3-d shapes but if it is 2-d you just count the cubes. This year I learned improper fractions you can find the improper fraction by using the mixed number. An improper fraction is when the numerator is greater than the denomenator.