问题
解答题
计算题: (1)(-3)+(-4)-(+11)-(-9); (2)3+50÷22×(-
(3)(
(4)-14+〔1-(1-0.5×
|
答案
①原式=-3-4-11+9
=-18+9
=-9;
②原式=3+50÷4×(-
)-11 5
=3-
-15 2
=-
;1 2
③原式=
×12-3 4
×12+1÷(-7 6
)1 15
=9-14-15
=-20;
④原式=-1+(1-
)×75 6
=-1+7 6
=
.1 6