(1)56.32+79.89+14.56
(2)145.66-78.25-56.44
(3)185.67-(356.77-284.35)
(4)49.72+(48.33-14.86)
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解:经计算:
(1)56.32+79.89+14.56,
=136.21+14.56,
=150.77;
检验:56.32+79.89+14.56=150.77.
(2)145.66-78.25-56.44,
=67.41-56.44,
=10.97;
检验:145.66-78.25-56.44=10.97;
(3)185.67-(356.77-284.35),
=185.67-72.42,
=113.25;
检验:185.67-(356.77-284.35)=113.25;
(4)49.72+(48.33-14.86),
=49.72+33.47,
=83.19;
检验:49.72+(48.33-14.86)=83.19.
解析分析:先根据小数加、减法混合运算的运算顺序计算,再运用计算器逐步输入计算检验即可.
点评:此题主要考查学生笔算和熟练运用计算器检验的能力.