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b) -(-2)+(4-7)-(-3+5)= 2+ (-3) +8= 7
c) 1/2-(-6)-3 1/4+(-2)+4 1/4= 0,5 +6-3,25+(-2)+4,25= 6,5 - 5,25 +2,25= 3,50
d) 2,5+(-4,6)-5,25+(-2)+7 1/4= -2,1-7,25+7,25= -2,1
e)-(-3 1/4-4)-5 1/2+1,25= - (-7,25) - 6,75= 7,25-6,75=0,50
f. 10 1/2+(-5-4,6)-3 1/5+(-2+5)+1 3/5= 10,5+ (-9,6)- 3,20+3+ 1,6=0,1-6,30+1,6=-4,6
myślę, że pomogłam :)
b) -(-2)+(4-7)-(-3+5)=2+(-3)-2=(-3)
c) 1/2-(-6)-3 1/4+(-2)+4 1/4=0,5+6+(-3,25)+(-2)+4,25=10,75+(-5,25)=5,5
d) 2,5+(-4,6)-5,25+(-2)+7 1/4=2,5+(-4,6)+(-5,25)+(-2)+7=9,5+(-11,85)=(-2,35)
e)-(-3 1/4-4)-5 1/2+1,25=-(-7,25)+(-5,5)+1,25=1,25+(-12,75)=(-11,5)
f. 10 1/2+(-5-4,6)-3 1/5+(-2+5)+1 3/5= 10,5 +(-9,6)+(-3,2)+3+1,6=15,1+(-12,8)=2,3