0.25×3/8+1/4×1/8+2.75×1/2的简便方法是什么？ 5
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0.25x3/8+1/4x1/8+2.75x1/2
=1/4x3/8+1/4x1/8+5.5x1/4
=1/4x(3/8+1/8+5.5)
=1/4x(4/8+5.5)
=1/4x(0.5+5.5)
=1/4x6
=3/2
=1.5
=1/4x3/8+1/4x1/8+5.5x1/4
=1/4x(3/8+1/8+5.5)
=1/4x(4/8+5.5)
=1/4x(0.5+5.5)
=1/4x6
=3/2
=1.5
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先通分
原式＝1/4×3/8+1/4×1/8+11/4x1/2
＝1/4x(3/8+1/8+11x1/2)
＝1/4x(1/2+11/2)
＝1/4x6
＝1.5
原式＝1/4×3/8+1/4×1/8+11/4x1/2
＝1/4x(3/8+1/8+11x1/2)
＝1/4x(1/2+11/2)
＝1/4x6
＝1.5
追答
先通分
原式＝1/4×3/8+1/4×1/8+11/4x1/2
＝1/4x(3/8+1/8+11x1/2)
＝1/4x(1/2+11/2)
＝1/4x6
＝1.5
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