河边有大乌龟23只、小乌龟16只。(B0n'J3|:I0D)Q(}
（1）大乌龟和小乌龟共有多少只？(B0n'J3|:I0D)Q(}
算式：提示3S-Z3d-{7g5x2F8H6]9W(B0n'J3|:I0D)Q(}
答：大乌龟和小乌龟共有'N(S-U:o/K5O(Q;G3}+j.u.M只。(B0n'J3|:I0D)Q(}
（2）大乌龟比小乌龟多几只？(B0n'J3|:I0D)Q(}
算式：提示*A3F-U0I2[3H*M7I6V2b)|+M'g-H(B0n'J3|:I0D)Q(}
答：大乌龟比小乌龟多,f-m0G-}'a)u3|8K7y只。(B0n'J3|:I0D)Q(}