Odpowiedź:
a) -1 2/5 × 1 7/8= - 7/5 × 15/8= -7/1 × 3/8= -21/8= -2 5/8
b) -7 4/5 ÷ -3 1/4 = - 39/5 ÷ - 13/4= - 39/5 × - 4/13 =
= - 3/4 × - 4/1 = 12/4 = 3
c) - 1,6 × - 5,04= - 16/10 × - 504/100 = - 4/5 × - 252/25 =
= 1008/125= 8 8/25
d) 0,063 ÷ -0,7 = 63/1000 ÷ - 7/10 = 63/1000 × - 10/7 =
= 9/100× -1 = - 9/100 = -0,09
