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2222×0.29+6666×0.09+3333×0.04=.

题目详情
2222×0.29+6666×0.09+3333×0.04=___.
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答案和解析
2222×0.29+6666×0.09+3333×0.04
=(2×0.29)×1111+(6×0.09)×1111+(3×0.04)×1111
=0.58×1111+0.54×1111+0.12×1111
=1111×1.24
=1111×(1+0.2+0.04)
=1111×1+1111×0.2+1111×0.04
=1111+222.2+44.44
=1377.64.