题目内容
计算:(1)(﹣12)÷4×(﹣6)÷2;
(2)
;(3)
;(4)
;(5)
;
(6)1+3+5+…+99﹣(2+4+6+…+98).
(2)
(6)1+3+5+…+99﹣(2+4+6+…+98).
解:(1)原式=(﹣12)×
×(﹣6)×
=(﹣3)×(﹣6)×
=18×
=9;
(2)原式=(﹣
)×16﹣
×(﹣5)×(﹣4)2×(﹣4)
=﹣10﹣80
=﹣90;
(3)原式=




=(﹣
﹣
)﹣(
﹣
)
=﹣4+
=
;
(4)原式=
×

=

=(
)+4
=2+4
=6;
(5)原式=
=|
﹣9|+|33|×(﹣5)
=|
|﹣165
=
;
(6)原式=1+(3﹣2)+(5﹣4)+…+(99﹣98)
=1+1+1+…+1=50.
=(﹣3)×(﹣6)×
=18×
=9;
(2)原式=(﹣
=﹣10﹣80
=﹣90;
(3)原式=
=(﹣
=﹣4+
(4)原式=
=
=(
=2+4
=6;
(5)原式=
=|
=|
=
(6)原式=1+(3﹣2)+(5﹣4)+…+(99﹣98)
=1+1+1+…+1=50.
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