联欢会上，芳芳唱了2首歌，李老师唱了1首歌，明明比芳芳多唱了1首歌。0k5j8x
（1）明明唱了几首歌？0k5j8x
算式：提示5z3v8p5D,~(G3m6U2[:A3n2n0k5j8x
答：明明唱了6x7z;W1i3C首歌。0k5j8x
（2）大家一共唱了几首歌？0k5j8x
算式：提示7c3E5V)Z8\8O3Y;X5j9j7M;e;O'S1x4|-d4t0q0k5j8x
答：大家一共唱了6l/e/X0s2n-Y+P8X4Y首歌。0k5j8x