=2,5×100 2,5-2,5,
=250;
(2)0,25×12,7×4 p> p>
=0,25×4×12,7,
=1×12,7,
=12,7
(3)27,25-(4,34; 7.25)
=27.25-7.25-4.34,
=20-4.34,
=15.66
(4)21.9-; 14,9- 5,1
=21,9-(14,9 5,1),
=21,9-20,
=1,9; 7,4 3,9 12,6
=(7,4 12,6) 3,9,
=20 3,9,
=23,9
(6)2,5×; 2,4
=2,5×4×0,6,
=10×0,6,
=6.