4.2×3.6-5.2×0.7要简算快

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4.2×3.6-5.2×0.7要简算快4.2×3.6-5.2×0.7要简算快4.2×3.6-5.2×0.7要简算快4.2×3.6-5.2×0.7=6×0.7×3.6-5.2×0.7=(6×3.6-5.

4.2×3.6-5.2×0.7要简算快
4.2×3.6-5.2×0.7要简算

4.2×3.6-5.2×0.7要简算快
4.2×3.6-5.2×0.7=6×0.7×3.6-5.2×0.7=(6×3.6-5.2)×0.7=(21.6-5.2)×0.7=17.4×0.7=12.18