如图,已知:AB∥EF,AE=AC,∠E=65°,求∠CAB的度数.
计算: (1)(2) (3)(4)
计算: (+1)+(-2)+(+3)+(-4)+…+(+99)+(-100)
计算:
计算: (1) (2)
计算: (1)23+(-17)+6+(-22) (2)(-2)+3+1+(-3)+2+(-4)