Just redefine the blocks, so the big block is a one, the flat is a tenth, the rod is a hundredth and the little cube is a thousandth. Because most pre-college students round up on a 5, that is what we have done in the worksheets that follow.Įuropean Format Adding decimal tenths with 0 before the decimal (range 0,1 to 0,9) European Format Adding decimal tenths with 1 digit before the decimal (range 1,1 to 9,9) European Format Adding decimal hundredths with 0 before the decimal (range 0,01 to 0,99) European Format Adding decimal hundredths with 1 digit before the decimal (range 1,01 to 9,99) European Format Adding decimal thousandths with 0 before the decimal (range 0,001 to 0,999) European Format Adding decimal thousandths with 1 digit before the decimal (range 1,001 to 9,999) European Format Adding decimal ten thousandths with 0 before the decimal (range 0,0001 to 0,9999) European Format Adding decimal ten thousandths with 1 digit before the decimal (range 1,0001 to 9,9999) European Format Adding mixed decimals with Various Decimal Places European Format Adding mixed decimals with Various Decimal Places (1 to 9 before decimal)īase ten blocks can be used for decimal subtraction. If you always round up on a 5, on average, you will have slightly higher results than you should. The main reason for this is not to skew the results of a large number of rounding events. A different way to round on a 5, however, is to round to the nearest even number, so 5.5 would be rounded up to 6, but 8.5 would be rounded down to 8. We should also mention that in some scientific and mathematical "circles," rounding is slightly different "on a 5". Likewise, for one digit is the number more than half way to 9. One last note: if there are three truncated digits then the question becomes is the number more than half way to 999. You will want to correct them right away in that case. Incrementing results in the necessity to regroup the tenths into an extra one whole, so the result is 7.0. Decide to increment since 59 is more than half way to 99. For example: Round 6.959 to the nearest tenth. In that case, some regrouping might be necessary. Of course, the situation gets a little more complicated if the terminating digit is a 9. Lastly, increment the tenths value by 1 to get 4.6. 50 or more)? It is, so the decision will be to increment. First, truncate the number after the tenths place 4.5|67. Here is a simple example: Round 4.567 to the nearest tenth. A simple strategy for rounding involves truncating, using the digits after the truncation to determine whether the new terminating digit remains the same or gets incremented, then taking action by incrementing if necessary and throwing away the rest. Rounding decimals is similar to rounding whole numbers you have to know your place value! When learning about rounding, it is also useful to learn about truncating since it may help students to round properly. Help and FAQ Terms of Use Privacy and Cookie Policy Tour/Introduction Feedback Teachers Parents Support Math-Drills Math-Drills on FacebookĮjercicios de Matemáticas Gratis Fiches d'Exercices de Maths Math Flash Cards Dots Math Game Video Tutorials Halloween Math Worksheets Thanksgiving Math Worksheets Christmas Math Worksheets Valentine's Day Math Worksheets Saint Patrick's Day Math Worksheets Easter Math Worksheets Seasonal Math Worksheets Home Addition Worksheets Subtraction Worksheets Multiplication Facts Worksheets Long Multiplication Worksheets Division Worksheets Mixed Operations WorksheetsĪlgebra Worksheets Base Ten Blocks Worksheets Decimals Worksheets Fact Families Worksheets Fractions Worksheets Geometry Worksheets Graph Paper Integers Worksheets Measurement Worksheets Money Math Worksheets Number Lines Worksheets Number Sense Worksheets Order of Operations Worksheets Patterning Worksheets Percentages Worksheets Place Value Worksheets Powers of Ten Worksheets Statistics Worksheets Time Math Worksheets Math Word Problems Worksheets
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