计算.(每题4分,共24分) (1) (2) (3) (4)(-81) (5) (6)
)计算(1) -26-(-15) (2)(+7)+(-4)-(-3)-14 (3)(-3)×÷(-2)×(-) (4)-(3-5)+32×(-3)
1+3+5+……+99-(2+4+6+……+98)
÷( - )-×(-4)2
(1− +)×(−48)
−20 +(−14)−(−18)−13