计算:
(1)(﹣17)+59+(﹣37)
(2)﹣43÷5×
(3)﹣1.53×0.75+0.53×﹣3.4×0.75
(4)(+1.75)﹣|﹣|+(+1.05)+(﹣
)﹣(﹣2.2)
(5)﹣(1﹣0.5)÷
(6).
计算
(1)﹣5﹣(﹣9)+13;
(2)|﹣15|﹣(﹣2)﹣(﹣5);
(3)9.9﹣(﹣1)+(﹣9.9)+(﹣10
);
(4)﹣24×(﹣+
﹣
).
计算:
(1)
(2)(﹣1)10×2+(﹣2)3÷4.
(1)(﹣3)2×23﹣(﹣4)÷2
(2)(﹣
+
﹣
)÷(﹣
)
(3)﹣14﹣(1﹣0.5)××[10﹣(﹣2)2]﹣(﹣1)3
(4)化简求值:3x2y﹣[2xy2﹣2(xy﹣x2y)+xy]+3xy2,(其中x=3,y=﹣
)
(1)解方程:9﹣3y=5y+25
(2)计算:(﹣3)3÷×(﹣
)2﹣2×(﹣
)