1) -12,6 ×0,7 +4,8×(-1,7)= -8,82 + -8,16= 16,98
2) (-5,16 +5,09)×(3,5-4)= -0,07 × -0,5= 0,035
3) 4/7×(-5 5/6) - 5/62×4 3/7= 4/7 × -35/6 -5/62×
×31/7 = -10/3 -36/14= 32/28= 1 1/7
4) (5 1/4 - 6 1/6)×(3 1/4 -0,55)=(21/4 -37/6)×
×(13/4 -11/20)= -22/24 × 54/20= - 3960/40=
= -99