1) 9+(-1 1/2) 2) 8+(-2 5/7) 3) 5+ ( -6 2/3)
4) -4 2/5 +3,4 5) -9,75+2 3/4 6) -6,5+ 3 1/2 7) 4 1/2+(-3) 8) 7 2/3 + (-9) 9) 2 4/5+(-6)
4) -4 2/5 +3,4 5) -9,75+2 3/4 6) -6,5+ 3 1/2 7) 4 1/2+(-3) 8) 7 2/3 + (-9) 9) 2 4/5+(-6)
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9+( -1 1/2)=9 - 1 1/2=8 2/2 - 1 1/2=7 1/2
8+( -2 5/7)=8 - 2 5/7=7 7/7 - 2 5/7=5 2/7
5+( - 6 2/3)=5 - 6 2/3= - (6 2/3 - 5)= - 1 2/3
- 4 2/5+3.4= - 4.4+3.4= - 1
- 9.75+2 3/4= - 9.75+2.75= - 7
- 6.5+3 1/2= - 6.5+3.5= - 3
4 1/2+( -3)=4.5 - 3=1.5
7 2/3+(-9)= - 9+7 2/3= - 8 3/3+7 2/3= - 1 1/3
2 4/5+( -6)=2.8 - 6= - 3.2