Accuplacer math placement test

How to divide fractions --Multiply by the recipricol of the second fraction (ex. 3/4 5/7 is rewritten as 3/4 x 7/5) How to add or subtract decimals --1. line up the decimals 2. fill in spaces with zeros 3. bring decimal STRAIGHT DOWN 4. Add using correct place value How to divide decimals --• If number you're dividing by is a decimal, then divide as usual and bring decimal point in the number being divided straight up. • If number you're dividing by IS a decimal, then make it not a decimal by pushing decimal to the right as much as needed. Push decimal exact same amount to the right in the other number. How to change a decimal to a fraction --Starting from the decimal point, count the decimal places (to the right). If there is one decimal place, put the number over 10 and simplify. If there are two places, put the number over 100 and simplify. If there are three places, put it over 1000 and simplify. Four places, put it over 10,000 and simplify. How to change a fraction to a decimal --Ex: 7/25= 7 x 4 25 -- ---- 25 x 4 = 100 So 7/25=.25 11/20= 11 x 5 55 -- --- 20 x 5 = 100 So 11/20=.55 Adding and subtracting decimals --1. Vertically line up numbers at their decimal points. 2. Use zeros as placeholders to make each number thee same number of places. 3. Bring the decimal point down below. 4. Add Vertically to find the sum; subtract vertically to find the difference. Multiplying Decimals --1. Multiple numbers as if whole numbers. 2. Then count total number of decimal places in the factors and add them (Ex: 2.2 and 2.33 has three total decimal places) 3. Add the total number of decimal places to product, counting left to right (Ex: 2.2*2.33 = 5126 -- 5.126 final answer)