题目内容
计算:(1)15×(-6);
(2)(-8)×(-0.25);
(3)(-0.24)×0;
(4)
×(-
);
(5)(-1
)×3
;
(6)(-
)×(-1
).
(2)(-8)×(-0.25);
(3)(-0.24)×0;
(4)
(5)(-1
(6)(-
解:(1)原式=-(15×6)=-90;
(2)原式=8×0.25 =2;
(3)原式=0;
(4)原式=-1;
(5)(-1
)×3
=(-
)×
=-(
×
)=-
;
(6)(-
)×(-1
)=
×
=1.
(2)原式=8×0.25 =2;
(3)原式=0;
(4)原式=-1;
(5)(-1
(6)(-
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