问题
解答题
计算: (1)(-7.6)×0.5; (2)(-3
(3)8×(-
(4)21×(-71)×0×43; (5)(-1
(6)(1-
|
答案
(1)(-7.6)×0.5=-3.8;
(2)(-3
)×(-21 2
),1 3
=
×7 2
,7 3
=
;49 6
(3)8×(-
)×(-4),3 4
=8×
×4,3 4
=24;
(4)21×(-71)×0×43=0;
(5)(-1
)×(-11 2
)×(-11 3
)×(-11 4
)-(-11 5
)×(-11 6
),1 7
=
×3 2
×4 3
×5 4
×6 5
×7 6
,8 7
=4;
(6)(1-
)×(1+1 2
)×(1-1 2
)×(1+1 3
)×(1-1 3
)×(1+1 4
),1 4
=
×1 2
×3 2
×2 3
×4 3
×3 4
,5 4
=
.5 8