2×2.5简算

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2×2.5简算2×2.5简算2×2.5简算=0.3×4×2.5=0.3×(4×2.5)=0.3×10=30

2×2.5简算
2×2.5简算

2×2.5简算
=0.3×4×2.5
=0.3×(4×2.5)
=0.3×10
=30