树上原来有7只小鸟,飞来8只后,又飞走了5只,现在树上有几只小鸟?
能简算的要简算 5.7×1.4+1.4×4.39.05﹣3.86﹣3.146.84×10.187×2.5+8.7×75.
1.59×1.9+0.41×1.9﹣1.9 18.6﹣[12﹣0.328×(18.3+6.7)] 63÷[6.5×(3.4﹣3.32)+2.98] 96.12÷[(7﹣6.46)×(43.6+56.4)] [49.84﹣(53.17﹣14.56)÷27]÷0.47.
计算: 7.77×31.08÷7.77101×0.5920× 2.5×12.5×3.20.84÷14+0.84×(+)×24.
计算. 1.8×[24.15÷(10.04﹣6.54)]= 5(x﹣1.6)=41×0.5= 3.42×4.7+0.83×34.2﹣3.42×3= 0.8+9.8+99.8+999.8+9999.8=
9.9÷0.125÷81.25×0.32×2.536.3×4.5+6.37×45 9999+999+99+9.