计算
(1)
(2)
(3)
(4)
(5)(-1)3-×[2-(-3)]
(6)
计算
(1)-3-(-14)-10+(-2)
(2)102+(-2)2×(-5)
(3)(-1+)÷(-)
(4)-14-×[2-(-3)2]
若2m=3,2n=2,则2m+2n=( )
A.12 | B.7 | C.6 | D.5 |
计算:
(1)
(2)(-48)÷8-(-25)×(-6);
(3)
(4)
(本题12分)计算:
(1)
(2)
(3)
(4)