20元7元.g9l2[(d+y;D7j4h8x.Q:A/a0@
(1)一个比一个贵多少元?.g9l2[(d+y;D7j4h8x.Q:A/a0@
算式:提示8o-^4n8m:c2Q.g9l2[(d+y;D7j4h8x.Q:A/a0@
答:一个比一个贵(j+q;T,i1U4x.H-g;b-T9v5C元。.g9l2[(d+y;D7j4h8x.Q:A/a0@
(2)你有15元钱,想买一个,还差多少钱?.g9l2[(d+y;D7j4h8x.Q:A/a0@
算式:提示8j6e:Z)@+[;q:d'E8q7L'h.g9l2[(d+y;D7j4h8x.Q:A/a0@
答:还差9p5K5g.q6{*d,e1K.b元钱。.g9l2[(d+y;D7j4h8x.Q:A/a0@