答案
解:(1)原式=35-75-42
=-82;
(2)原式=
×
×
×
=3;
(3)原式=(12.25×40)×(13.5×20)
=490×270
=132300;
(4)原式=17.48×37+17.48×1.9+17.48×44
=17.48×(37+19+44)
=17.48×100
=1748.
解:(1)原式=35-75-42
=-82;
(2)原式=
×
×
×
=3;
(3)原式=(12.25×40)×(13.5×20)
=490×270
=132300;
(4)原式=17.48×37+17.48×1.9+17.48×44
=17.48×(37+19+44)
=17.48×100
=1748.