问题
填空题
计算: (1)2-5=______; (2)2×(-3)=______; (3)(-2)÷(-
(4)-22×|
(5)2ab-3ab=______; (6)23°35′+56°40′=______°______′. |
答案
(1)2-5=-3;
(2)2×(-3)=-6;
(3)(-2)÷(-
)=(-2)×(-3)=6;1 3
(4)-22×|
|=-4×1 4
=-1;1 4
(5)2ab-3ab=-ab;
(6)23°35′+56°40′=80°15′;
故答案为:-3,-6,6,-1,-ab,80,15.