1) -8,5 + ( -0,3 + 4/5)= -8,5 + (-0,3) + 4/5= -8,5 - 0,3 + 4/5= -8,8 + 4/5= -8,8 + 0,8= -8
2) -9 3/7 - (-6 + 4/7)= -9 3/7 + ( -6 + 4/7)= -9 3/7 - 6 + 4/7= -9 3/7 - 6 + 4/7= -9 - 6 + 3/7 + 4/7= -15 + 7/7= -15 + 1= -14
1) -8,5 + ( -0,3 + 4/5)
= -8,5 + (-0,3) + 4/5
= -8,5 - 0,3 + 4/5
= -8,8 + 4/5
= -8,8 + 0,8
= -8
2) -9 3/7 - (-6 + 4/7)
= -9 3/7 + ( -6 + 4/7)
= -9 3/7 - 6 + 4/7
= -9 3/7 - 6 + 4/7
= -9 - 6 + 3/7 + 4/7
= -15 + 7/7
= -15 + 1
= -14