来自董文永的问题
2÷[(127-136)×9]×61.25×67.875+0.125×6787.5+125×0.53375.
2÷[(127-136)×9]×6
1.25×67.875+0.125×6787.5+125×0.53375.
1回答
2020-05-06 15:41
2÷[(127-136)×9]×61.25×67.875+0.125×6787.5+125×0.53375.
2÷[(127-136)×9]×6
1.25×67.875+0.125×6787.5+125×0.53375.
(1)2÷[(127-136)×9]×6,=2÷[127×9-136×9]×6,=2÷[13-14]×6,=2÷112×6,=2×12×6,=144;(2)1.25×67.875+0.125×6787.5+125×0.53375,=125×0.67875+125×6.7875+125×0.53375,=125×(0.67875+...