235×12.1+235×42.2-135×54.3 (简便算法)

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235×12.1+235×42.2-135×54.3(简便算法)235×12.1+235×42.2-135×54.3(简便算法)235×12.1+235×42.2-135×54.3(简便算法)235×

235×12.1+235×42.2-135×54.3 (简便算法)
235×12.1+235×42.2-135×54.3 (简便算法)

235×12.1+235×42.2-135×54.3 (简便算法)
235×12.1+235×42.2-135×54.3
=235×(12.1+42.2)-135×54.3
=235×54.3-135×54.3
=(235-135)×54.3
=100×54.3
=5430