用简便方法计算:
(1)6.7-3.15-1.85
(2)0.25×32×12.5
(3).
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解:(1)6.7-3.15-1.85,
=6.7-(3.15+1.85),
=6.7-5,
=1.7;
(2)0.25×32×12.5,
=(0.25×4)×(8×12.5),
=1×100,
=100;
(3),
=363636,
=16+15-14,
=17.
解析分析:(1)运用减法性质解答,
(2)化32=4×8,再运用乘法结合律即可解答,
(3)运用乘法分配律解答.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.