问题
解答题
计算题: (1)2-5+4-(-7)+(-6) (2)(-1
(3)(2
(4)-22×(-
(5)-12+|-8|÷(3-5)-(-2)3. |
答案
(1)原式=2-5+4+7-6
=-3+4+7-6
=1+7-6
=2;
(2)原式=(-
)÷5 3
×(-4 5
)6 7
=(-
)×5 3
×(-5 4
)6 7
=(-
)×(-25 12
)6 7
=
;25 14
(3)原式=(
-9 4
-9 2
)×(-9 8
)8 9
=
×(-9 4
)-8 9
×(-9 2
)-8 9
×(-9 8
)8 9
=-2+4+1
=3;
(4)原式=-4×(-
)+8×1 2 1 4
=2+2
=4;
(5)原式=-1+8÷(-2)+8
=-1-4+8
=5.