Rounding numbers

Rounding numbers Rounding numbers coverts large numbers and decimal numbers to simpler forms which are then useful to solve or express in a given question. This concept is commonly used in many word problem and different calculations. Rounding to the tenths place is rounding of a decimal number to the nearest one decimal space. Rounding to the hundredths place is rounding a decimal number to the nearest two decimal spaces. Rounding to the thousandths place is rounding a decimal number to the nearest three decimal spaces and so on. Example 1: A basket of Mangoes consists of 8 mangoes and each of them cost $ 2.13. Find the total cost of the basket (Round to a whole number.) Solution: Number of Mangoes in each basket = 8. Price of each Mango = $ 2.13. Hence price of the basket = 8 x $ 2.13 = 17.04 (Rounding the amount to a whole number.) Hence the price of the basket = $ 17. Question: Multiple choice question (Pick the correct option.) What is the answer for dividing 155 6 to the tenth decimal place? a) 25.83 b) 25.8 c) 25.9 d) None of these. Correct answer: option b. Here 155 is the dividend and 6 is the divisor. While dividing the quotient is 25.83. For rounding to the tenth decimal place the number to the right of the tenths place need to be check. Here 3 5. So while rounding the number place a zero in the hundredth decimal place. Hence rounding the number to the tenth decimal place value = 25.8.