Question

Efetue as adições e as subtrações

a) -7/8 + 4,5 =
b) 13/4 + 19/5=
c) -8/11 - 5/3=
d) 79,05 - 12,4=
e) 123 - 35/4=
f) 1347,01 + 132,86=
g) 49/7 + (-18/3)=
h) 50 - 4,99=

COM CALCULOOOO!​

Answer 1

Resposta:

$a)\\ \\ -\frac{7}{8} +4,5=-\frac{7}{8}+\frac{9}{2} =\frac{-7+36}{8} =\frac{29}{8} \\ \\ b)\\ \\ \frac{13}{4}+ \frac{19}{5} =\frac{65+76}{20} =\frac{141}{20} \\ \\ c)\\ \\ -\frac{8}{11} -\frac{5}{3} =\frac{-24-55}{33} =-\frac{79}{33} \\ \\ d)\\ \\ 79,05-12,4=\\ \\ ~~~~79,05\\ -12,40\\ ----\\ ~~~~66,65$

$e)\\ \\ 123-\frac{35}{4} =\frac{492-35}{4} =\frac{457}{4} \\ \\ f)\\ \\ 1347,01-132,86=\\ \\ ~~~~~~1347,01\\ -~~~132,86\\ ~~------\\ ~~~~~~1214,15\\ \\ g)\\ \\ \frac{49}{7} +(-\frac{18}{3})=7-6=1\\ \\ h)\\ \\ 50-4,99=\\ \\ ~~~~50,00\\ -~~4,99 \\ ~~----\\ ~~~~~45,01$