奶奶买回不到20块糖，3块3块地数还余2块，5块5块地数还余2块，问奶奶到底买回多少块糖？4@*]9i-M'C9x5~(a
算式：提示*E:s)u1@/n/m/x7H9@,W4m4@*]9i-M'C9x5~(a
答： 奶奶买回'\2S(d-A0U6Z/\+J.m块糖。4@*]9i-M'C9x5~(a