How do you add #\frac { 3} { 10} + \frac { - 47} { 100}#?

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Answer 1 · 2017-01-22T11:00:23

#-17/100# or -0.17

#3/10+(-47/100)#

#=(30+(-47))/100#

#=(30-47)/100#

#=-17/100 or -0.17#

check:

#3/10=0.3#

#plus-47/100=-0.47#

#0.3+(-0.47)=0.17=-17/100#

#:.0.3-0.47=-0.17=-17/100#

Answer 2 · 2017-01-22T11:15:58

#-17/100#

#color(green)([3/10color(red)(xx1)]" "-47/100#

#color(green)([3/10color(red)(xx10/10)]color(white)(.)-47/100#

#color(green)([30/100]" "color(white)(.)-47/100#

#color(white)(.)#

Split the #-47/100# into #-30/100 - 17/100# giving:

#color(white)(.)#

#color(green)([30/100]" "color(white)(.)-30/100-17/100#

#color(green)(0 - 17/100)#

#-17/100#