计算下面各题,能简算的要简算1243﹣1334÷23×12 2×3.14×8×5+3.14×82 8.86﹣5.29﹣1.71﹣1.86+(1﹣)×÷ 85×0.75+16×75%﹣.
用简便方法计算 (1)0.13×+×13% (2)18×25%+68×25%+14÷4.
用简便方法计算 8.16+5.49+2.84+4.51 1.29+3.7+2.71+6.3 12.98﹣(6.37+3.98) 36.9﹣10.47+3.1﹣10.53.
用简便方法计算下面各题. 18.5×30 34.5﹣8.9﹣9.9﹣10.9 (8﹣0.8)×125 3.5×1.02+35×0.098.
68×34+68×67﹣68.
26×49+26.