计算下列各题(每小题5分,共25分)(1)22+(-19)-(-8)+(+34)-(+15) (2) (3) (4)-62÷12+ 5×(-3)2 -(-18)÷9 (5) (-)2×÷+(-2)÷()4
.计算: (1)(2) (3)(4)(6)
(本题满分10分) 计算:
计算:.
(8分)计算:.