Rounding Decimal Numbers Sometimes close enough is good enough!

Molly has $16 in her pocket She buys: 3 $1.89 each 3 $2.19 each 3 Large French $ $1.79 each Does she have enough money?

Gas costs $1.79 per gallon I’m running on empty and I have a 20 gallon tank on my truck…… About how much will it cost to fill up?

You have one hour to take a 50 question test. About how much time can you spend on each question? Close enough is good enough!

The rounding poem Find your number Look right next door 4 or less, just ignore 5 or more add one more!

Rounding Whole Numbers Round 474 to the closest hundred. 474 Look right next door. Five or more, add one more. Find your number. Four or less, just ignore. 474 Rounded to the hundreds becomes 500.

Round 474 to the closest 10’s Rounding Whole Numbers 474 Look right next door. Find your number. Four or less, just ignore. 474 Rounded to the tens becomes 470.

Try to round off these numbers 4,215 (to nearest hundred) 394 (to nearest ten) 27 (to nearest ten) 127,591 (to nearest thousand) 638 (to nearest hundred)

What about decimal numbers ? The same rules (and poem) apply! Round to the closest hundredths Find your number. Look right next door. Answer: 4.17

Remember If you are asked to round to the nearest tenth…….your answer stops at the tenth place! Example: Round to the closest tenth would be 42.7

Special Case! Rounding a 9 Round to the closes hundredths Since there is a “9” in the hundredths place consider the tenth and hundredths together – 19 – do you leave it at 19 or move it to 20?

Round 4.95 to the closest tenth Since there is a “9” in the tenth spot consider the ones and tenths together…… should you leave it at 49 or move it to 50? 4.95 rounded to the nearest tenth is 5.0

Try these Round to tenths: Round to hundredths