问题
解答题
用递等式计算,能简便计算的要简便计算.
0.034×0.5×0.6
50.4×1.9-1.8
25.8+3.76×0.25
102×0.45.
答案
(1)0.034×0.5×0.6,
=0.034×(0.5×0.6),
=0.034×0.3,
=0.0102;
(2)50.4×1.9-1.8,
=95.76-1.8,
=93.96;
(3)25.8+3.76×0.25,
=25.8+3.76×
,1 4
=25.8+0.94,
=26.74;
(4)102×0.45,
=(100+2)×0.45,
=100×0.45+2×0.45,
=45+0.9,
=45.9.