True or false?

Which of the following is true?

A. Three and three ninths plus seven and six-elevenths equal ten and eighty-seven ninety ninths.
B. two and three-eighths plus six and four-fifths equals eight and twelve fortieth
C. three and three sevenths plus four and two-thirds equals seven and two twenty ones.
D. four and five-sixths plus five sevenths equal nine and ten thirteenths






Step-by-step explanation:

a1=3+93+7+116=33359=10332910.8788 a2=109987=10+9987=9910 99+87=99990+87=991077=33359=10332910.8788 a1=a2  A=1
b1=283+654=819+534=4095+40272=4095+272=40367=9407=9.175 b2=81412=8+1412=148 14+12=14112+12=14124=762=8768.8571 b1 =b2  B=0
c1=373+432=724+314=2172+2198=2172+98=21170=82128.0952 c2=7212=7+212=217 21+2=21147+2=21149=72127.0952 c1=c2 C=0
d1=465+75=629+75=42203+4230=42203+30=42233=542235.5476 d2=91310=9+1310=139 13+10=13117+10=13127=913109.7692 d1=d2 D=0

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Math student
The eighth-grade goal is ½ of the sixth-grade goal.

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