7 6/10
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It is one and nine twentieths.
3.8 + 2.9 = 6.7
seven and eight tenths. you have to change one half to five tenths and then add the whole numbers and then the fraction
9 and 6/40 if simplified 9 and 3/20
To add two fractions, we need a common denominator. In this case, the common denominator for 5 and 10 is 10. Therefore, two fifths is equivalent to four tenths, and five tenths remain the same. Adding these together, we get four tenths plus five tenths equals nine tenths.