Q: How do you show your work for two fifths plus three tenths?

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If 3.8 was rewritten to show tenths and hundredths?

Nine tenths of one percent = 0.009

0.9

Convert to a common denominator; convert to decimal; compare denominators (larger denominator = smaller fraction, if the numerator is the same).

A mixed fraction is a rational number which has an integer part as well as a fractional part: for example, two and three fifths = 2 3/5. Note: Now that the powers that be have disabled superscripts and subscripts on this browser, it is not possible for me to show the fraction in its proper form.

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100/5 =20 20x3=60 is a simple way.

abc.def I use letters to show the meaning of placeholders in the Arabic decimal fraction system. "c" is the in units place. Five is just 5 on its own. "bc" is in the tens and the units places, 25 for example, twenty plus five. "abc" is in the hundreds place plus the tens place plus the units place. say 325. on the right hand side of the decimal place we start with ... "0.d" or the tenths position. so three tenths is 0.3 "0.de" would be a number of tenths plus a number of hundredths, say 0.38 JCF

You write the number 3 over the number 10, and a horizontal line in between.

If 3.8 was rewritten to show tenths and hundredths?

Nine tenths of one percent = 0.009

0.9

Convert to a common denominator; convert to decimal; compare denominators (larger denominator = smaller fraction, if the numerator is the same).

It is 8.0 : the trailing 0 is necessary to show that it has been rounded to the nearest tenths.

get a ruler

That is it 6 hundredths, not six tenths.

No. In that case it is 0.0

18.64 rounded to the nearest tenth is 18.6