如题所述
12x45+15×36+30x26+60x15简便运算
=2×6x5×9+15×2×18+30x26+30×2x15
=30×18+30×18+30x26+30×30
=30×(18+18+26+30)
=30×92
=2760
=2×6x5×9+15×2×18+30x26+30×2x15
=30×18+30×18+30x26+30×30
=30×(18+18+26+30)
=30×92
=2760
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