125 ×14/17+375×1/17=(125*14+125*3)/17=125*17/17=125
6/5÷[(3/4+2/30)] =6/5÷3/4+6/5÷(2/30)=6/5*4/3+6/5*30/2=98/5
2、125 ×14/17+375×1/17 3、1×5/1 + 5×10/1 + 10×15/1+……＋45 ×50/1
2个回答
相关问题
-
1/3×（15+3/14） 42×（19/14-8/21） 1/5×1/10×75×7/15 9/10×4+2/5 简便
-
20×20-19×19+18×18-17×17+16×16-15×15+14×14...+2×2-1×1 怎么算?
-
[1/1×4+14×7+17×10+110×13+113×16]．
-
1/1×2×3×4+1/2×3×4×5+1/3×4×5×6+……+1/17×18×19×20
-
计算1／5×8+1／8×11+1／11×14+1／14×17+1／17×20,它的结果是多少,
-
计算：[1×2×3+3×6×9+5×10×15+7×14×21/1×3×5+3×9×15+5×15×25+7×21×35
-
计算：[1×2×3+3×6×9+5×10×15+7×14×21/1×3×5+3×9×15+5×15×25+7×21×35
-
计算：[1×2×3+3×6×9+5×10×15+7×14×21/1×3×5+3×9×15+5×15×25+7×21×35
-
计算：[1×2×3+3×6×9+5×10×15+7×14×21/1×3×5+3×9×15+5×15×25+7×21×35
-
计算：[1×2×3+3×6×9+5×10×15+7×14×21/1×3×5+3×9×15+5×15×25+7×21×35