问题
解答题
|
答案
(1)18.12-(5.3+1.12),
=18.12-1.12-5.3,
=17-5.3,
=11.7;
(2)2×
+1 4
×5+1 4
,1 4
=(2+5+1)×
,1 4
=8×
,1 4
=2;
(3)2.5×3.2×1.25,
=(2.5×0.4)×(8×1.25),
=1×10,
=10;
(4)41×101,
=41×100+41×1,
=4100+41,
=4141.