问题:
计算:
(1)-7+13-6+20;
(2)(-49)-(+91)-(-5)+(-9);
(3)1+(-2)+|-2-3|-5;
(4)(-5)×(-7)-5×(-6);
(5) (-
2
3
)÷(-
8
5
)÷(-0.25);
(6) -2•(-
1
2
)2+|-(-2)|3-(-
1
2
).
计算:
(1)-7+13-6+20;
(2)(-49)-(+91)-(-5)+(-9);
(3)1+(-2)+|-2-3|-5;
(4)(-5)×(-7)-5×(-6);
(5) (-
)÷(-
)÷(-0.25);
(6) -2•(-
)2+|-(-2)|3-(-
).
(1)-7+13-6+20;
(2)(-49)-(+91)-(-5)+(-9);
(3)1+(-2)+|-2-3|-5;
(4)(-5)×(-7)-5×(-6);
(5) (-
2 |
3 |
8 |
5 |
(6) -2•(-
1 |
2 |
1 |
2 |
参考答案: