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The first digit after the decimal point is "9". We now look at the second digit after the decimal point. As this is "7", which is greater than or equal to "5", we must round the "9" up (we make the number larger).

This makes the "9" become a "0" and to make this number larger we must also therefore make the "1" into a "2". This is because the "9" has actually become a "10" and so we have to add "1" to the digit to the left (1 + 1 = 2).

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12y ago
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Q: How Do you round 1.978 to one decimal place?
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