题目内容
599×0.2100=______;(-
)7×814=______.
1 |
9 |
599×0.2100,
=599×0.299×0.2,
=(5×0.2)99×0.2,
=0.2;
(-
)7×814,
=(-
)7×(92)4,
=(-
)7×98,
=(-
×9)7×9,
=(-1)7×9,
=-1×9,
=-9.
=599×0.299×0.2,
=(5×0.2)99×0.2,
=0.2;
(-
1 |
9 |
=(-
1 |
9 |
=(-
1 |
9 |
=(-
1 |
9 |
=(-1)7×9,
=-1×9,
=-9.
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