0.52÷5+0.87×4/5的步骤
=0.52x1/5+0.87x4/5
=0.13x4/5+0.87x4/8
=（0.13+0.87）x4/5
=1x4/5
=4/5
0.52÷5 +0.87×4/5
=（0.52+0.87）/5
=1.39/5
=0.278
0.52÷5+0.87×4/5
=0.13×4÷5+0.87×4/5
=0.13×4/5+0.87×4/5
=4/5×（0.13+0.87）
=4/5×1
=4/5
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