如题所述
320x44+63x440
=32x440+63x440
=(32+63)x440
=(100-5)x440
=100x440-5x440
=44000-2200
=41800追问
=32x440+63x440
=(32+63)x440
=(100-5)x440
=100x440-5x440
=44000-2200
=41800追问
谢谢
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如题所述
谢谢
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