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脱式计算:52.4-(15+0.6)÷1.69.87×99+9.8746.8÷0.9÷0.45.5×17.3+6.7×5.5.

题目详情
脱式计算:
52.4-(15+0.6)÷1.6 9.87×99+9.87 46.8÷0.9÷0.4 5.5×17.3+6.7×5.5.
▼优质解答
答案和解析
解;①52.4-(15+0.6)÷1.6,
=52.4-15.6÷1.6,
=52.4-9.75,
=42.65;

②9.87×99+9.87,
=9.87×(99+1),
=987;

③46.8÷0.9÷0.4,
=46.8÷(0.9×0.4),
=46.8÷0.36,
=130;

④5.5×17.3+6.7×5.5,
=5.5×(17.3+6.7),
=5.5×24,
=132.