a)105+(-7)+(-13)+20= 105+(-20)+20=105b) -16+67+(-10)+(-7)+66= -16+60+(-10)+66= 50+50 = 100c)2 2/5 +(-4,1)+7 3/5+(-5,9)= 10+(-10)=0d) 4 4/7 + 5,4+(-1 4/7)+(-7,4)= 3+(-2)= 1e)-0,75+6,3+(-1,1)+(- 1/4)+(-6,3)= -2,1
a) 125-20=105
b) -33+133=100
c) 10+1,8=11,8
d) 3+(-2)=1
e)-7,05+7,65=0,6
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a)105+(-7)+(-13)+20= 105+(-20)+20=105
b) -16+67+(-10)+(-7)+66= -16+60+(-10)+66= 50+50 = 100
c)2 2/5 +(-4,1)+7 3/5+(-5,9)= 10+(-10)=0
d) 4 4/7 + 5,4+(-1 4/7)+(-7,4)= 3+(-2)= 1
e)-0,75+6,3+(-1,1)+(- 1/4)+(-6,3)= -2,1
a) 125-20=105
b) -33+133=100
c) 10+1,8=11,8
d) 3+(-2)=1
e)-7,05+7,65=0,6