1) -1,25×(-8)×(-3,47)= 10×(-3,47)= -34,7
2) 50×(-2)×(-0,001)×(-54,8)= -100×(-0,001)×(-54,8)= 0,1×(-54,8)= -5,48
3) 9/16×(-32)×(-70)×11/35= 9×(-2)×(-70)×11/35= (-18×70×11)/35= -18×2×11=
=2×11×(-18)=22×(-18)= -396
4) -21/6×(-6)/13×4,8×(-5/24)= 21/13×24/5×(-5/24)= (21×24×(-5))/(13×5×24)=
= -21/13