巧算:9.728÷3.2÷2.5
问题描述:
巧算:9.728÷3.2÷2.5
答
9.728÷3.2÷2.5
=9.728÷(3.2×2.5)
=9.728÷(0.8×4×2.5)
=9.728÷(0.8×10)
=9.728÷8
=1.216