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43.4%(23.4.7)简便

234×56.7+23.4×433 =(234×56.7+23.4×433)÷10 =234×56.7÷10+23.4×433÷10 =23.4×56.7+23.4×43.3 =23.4×(56.7+43.3)×10 =23.4×100×10 =23400

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