题目内容
(0.5×0.8+2.8)÷(2.5×1.6)
解:(0.5×0.8+2.8)÷(2.5×1.6),
=(0.4+2.8)÷(2.5×4×0.4),
=3.2÷4,
=0.8.
分析:先计算括号内部的,后面的括号内把1.6拆成4×0.4,再运用乘法的结合律进行计算.
点评:本题按照小数的四则混合运算的顺序进行计算即可,计算的过程中灵活的运用简便方法进行计算.
=(0.4+2.8)÷(2.5×4×0.4),
=3.2÷4,
=0.8.
分析:先计算括号内部的,后面的括号内把1.6拆成4×0.4,再运用乘法的结合律进行计算.
点评:本题按照小数的四则混合运算的顺序进行计算即可,计算的过程中灵活的运用简便方法进行计算.
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