计算: 10 + 8 × - 1 2 2 - 2 ÷ 1 5 .
(2011浙江丽水,17,6分)计算:|-1|--(5-π)0+4cos45°.
(2011福建泉州,18,9分)计算:.
计算:
(2011湖南邵阳,17,8分)计算:。
计算:.