(陵猜裤1)5.48+8.73+4.52+1.27,
=(5.48+4.52)+(8.73+1.27),
=10+10,
=20;
(兆戚2)0.4×1.25×25×8,
=(0.4×25)×(1.25×8),
=10×10,
=100;
(3)17.5-4.25-5.75,
=17.5-(4.25+5.75),
=17.5-10,
=7.5;
(4)276×
÷27.6,尺简2 7
=276÷27.6×
,2 7
=10×
,2 7
=
;20 7
(5)9.25×9.9+92.5%,
=0.925×99+0.925,
=0.925×(99+1),
=0.925×100,
=92.5;
(6)
×4 3
+2 7
÷75%,5 7
=
×4 3
+2 7
×5 7
,4 3
=
×(4 3
+2 7
),5 7
=
.4 3