How do you round a decimal number?
"Round decimals to a specified number of decimal places (ACMNA156). "
Rounding decimal numbers involves finding the nearest whole number by looking at the digits to the right of the decimal point. Rounding can help make calculations easier, and it can also help simplify large numbers. When rounding, you should look at the digit to the right of the number you want to round. This is the one that will determine whether you round up or down.
Rounding Decimal Numbers
Nearest Whole Number: The number closest to the decimal number when rounded. Digits to the Right of the Decimal Point: The numbers to the right of the decimal point that will be used to determine what number the decimal number should be rounded to. Rounding Up or Down: The decision made by looking at the digit to the right of the number you want to round. If the digit is 5 or higher, you round up. If it is 4 or lower, you round down.
In mathematics, rounding is also called 'bankers rounding'. The term 'rounding' comes from a Latin word meaning 'to make round'. In Japan, they use a different system for rounding than other countries do - they round up or down depending on if the last digit is odd or even.
Work together in pairs: What is the rule for rounding decimal numbers to the nearest tenth?
Work together in pairs: What is the result of rounding 3.79 to two decimal places?
Brain break: Create a 3D sculpture out of paper that represents an emotion. Think about what shapes, colors, and textures would best represent the chosen emotion and create a sculpture that conveys it.
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