1) Calcule: a) + 5+ 3 =
a) + 10 +7=
b) - 50 - 50 =
c)-3-1 =
d) + 5+18=
e) +20 + 40 =
f) + 10 + 25 =
g) +1+4=
h) + 6 +9=
i)-8-12 =
j)-31 - 18 =
k) - 60 - 30 = 0) + 12 + 18 = g) - 4 - 3 = h) -4 - 15 = ​
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