0.15×30= 0.56÷0.7= 4.5÷0.9= 1.8×0.023.5×0=
2.5×0.6= 0.22= 10-2.75= 0.6y+0.9y-y=
①89×(10.32-6.98)
②11.23+6.88+3.77
③15-6.4+3.6
④101×0.41-0.41
⑤(9.25-4.75)÷2.5÷4
⑥[1-(0.5-0.25)]×0.6
9×0.7=6.3
99×0.77=76.23
999×0.777=776.223
9999×0.7777=7776.2223
双人观光船/只
三人观光船/只