问题
解答题
12.5×198÷(18÷8)
1.2×8.64+1.136×12-2×0.12×50.
答案
(1)12.5×198÷(18÷8),
=12.5×198÷2.25,
=12.5×(8×24.75)÷2.25,
=(12.5×8)×24.75÷2.25,
=100×24.75÷2.25,
=2475÷2.25,
=1100;
(2)1.2×8.64+1.136×12-2×0.12×50,
=1.2×8.64+11.36×1.2-(2×50)×0.12,
=1.2×8.64+11.36×1.2-10×1.2,
=1.2×(8.64+11.36-10),
=1.2×(20-10),
=1.2×10,
=12.