2÷[(1/27-1/36)×9]×6 1.25×67.875+0.125×6787.5+125×0.53375.
问题描述:
2÷[(
-1 27
)×9]×61 36
1.25×67.875+0.125×6787.5+125×0.53375.
答
(1)2÷[(
-1 27
)×9]×6,1 36
=2÷[
×9-1 27
×9]×6,1 36
=2÷[
-1 3
]×6,1 4
=2÷
×6,1 12
=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+6.7875+0.53375),
=125×8,
=1000.