问题
解答题
计算: (1)(
(2)(-1
(3)12.25×(-13.5)×(-40)×20; (4)17.48×37+174.8×1.9+8.74×88. |
答案
(1)原式=35-75-42
=-82;
(2)原式=
×3 2
×4 3
×5 4 6 5
=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.