Rounding Decimals

Rounding Decimals

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  • School was seriously so hard today... I wonder if I can get anyone to help me...
  • Hello there! My name is Math Man and I help students with math!
  • That is awesome! I really need help with rounding decimals!
  • First thing you need to know is the place values of any number. For example, can you tell me what place value every number is in 123.456?
  • The 1 is in the hundreds place, the 2 is in the tens place, the three is in the ones place, the 4 is in the tenths place, the 5 is in the hundredths place and the 6 is in the thousandths place!
  • That's correct! Now, to round we need to look at the number to the right of the place we are rounding to.
  • Ok! I think I remember my teacher saying if it's 4 or less it remains the same and 5 or more it rounds up!
  • That is correct again! So if I want to round 43 to the tens place I look at the 3 and since it is less than 5 we leave the 4 in the tens place because it remains the same so I get an answer of 40!
  • That makes sense! What if the number is 0.239 and I need to round to the hundredths place?
  • Well you need to look at the 9 that's in the thousandths place and see that it's 5 or greater so the number in the hundredths place bumps up from 3 to 4. This leaves you with the answer of 0.24!
  • Thank you so much Math Man! I think I'm ready to do my homework!
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