а)-1/3-0,5=-1/3-5/10=-10/30-15/30=-25/30=-5/6
б)-2/7+0,3=-2/7+3/10=-20/70+21/70=1/70
в)-2/9+1,2=-2/9+1 2/10=-2/9+12/10=-20/90+108/90=88/90=44/45
г)0,72:(-48/49)=72/100:(-48/49)=72/100*(-49/48)=6/100*(-49)/4=-294/400=-147/200=-735/1000=-0,735
a) – 1/3 – 0,5
– 1/3 – 1/2
– 5/6
б) – 2/7 + 0,3
– 2/7 + 3/10
1/70
в) – 2/9 + 1,2
– 2/9 + 6/5
44/45
г) 0,72 ÷ (– 48/49)
18/25 ÷ (– 48/49)
– 18/25 ÷ 48/49
– 18/25 × 49/48
– 3/25 × 49/8
– 147/200
а)-1/3-0,5=-1/3-5/10=-10/30-15/30=-25/30=-5/6
б)-2/7+0,3=-2/7+3/10=-20/70+21/70=1/70
в)-2/9+1,2=-2/9+1 2/10=-2/9+12/10=-20/90+108/90=88/90=44/45
г)0,72:(-48/49)=72/100:(-48/49)=72/100*(-49/48)=6/100*(-49)/4=-294/400=-147/200=-735/1000=-0,735
a) – 1/3 – 0,5
– 1/3 – 1/2
– 5/6
б) – 2/7 + 0,3
– 2/7 + 3/10
1/70
в) – 2/9 + 1,2
– 2/9 + 6/5
44/45
г) 0,72 ÷ (– 48/49)
18/25 ÷ (– 48/49)
– 18/25 ÷ 48/49
– 18/25 × 49/48
– 3/25 × 49/8
– 147/200