31×41\29+41\69×29
31×41\29+41\69×29
31*29/41+69/41*29
31*41分之29+41分之69*29=?
31×41/29+41/69×29 要求简便
31乘以41分之29加41分之69乘以29用简便方法计算
31乘41分之29+41分之69乘29简便运算=?
31×41分之29+41分之69×29 用简便方法计算
31乘29/41加69/41乘29,用简便方法计算!
[(1/31+1/37+1/41+1/47+1/53+1/69)*(1/29+1/31+1/37+1/41+1/47+1
93 16 24 29 31 33 49 71 91 41 17 23 34 56 51 89 69 43 22 19
(1+11+21+31+41+51+1+71+81+91)+(9+19+29+39+49+59+69+79+89+99)
11*19+21*29+31*39+41*49+51*59+61*69+71*79+81*89+91*99 = 3308