7/15×3/8+1/15×7/16+1/15×3又1/2用简便算法怎么做?

7/15*3/8+1/15*7/16+1/15*3又1/2 简算:7/15×3/8+1/15×7/16+7/2÷15 7/15*3/8+1/15*7/16+1/15*3.5如何计算谢谢、、、急 7/15*3/8+1/15*7/16+1/15*3 1/2是3又2分之1 7/15*3/8+1/15*7/16+1/15*7/2,你能使这道题的计算变得简便吗? 1/2+3/4+7/8+15/16简算 15/8*[3/4-(7/16-1/4)]简便计算 1/2+3/4+7/8+15/16+...+1023/1024 1/2,-3/4,7/8,-15/16找规律 8/15*[3/4-（7/16-1/4）]要简算 7/15×3/8+1/15×7/16+1/15×3又1/2用简便算法怎么做? 7/15×3/8+1/15×7/16+1/15×3又1/2简便算法,谢谢! 1/15*7/16+7/15*3/8+1/15*3又1/2简便运算 快 7/15+8*(3/8+1/15) 简便方法 7/15x3/8+1/15x7/16+1/15x3又1/2要脱式计算 (3又16分之15-2.1)×7分之5+1又8分之7÷30 7/15+[5/8一1/3]÷7/8 简便方法：3/10×3/8+1/15×7/16+1/5×3.5