50-8-2241 76-23-1876-(23-18) 32+17+650
42-4+825 86-42+1386-(42-13) 47+9+4197
35+47=82 82-54=28 | 72-51=21 21+16=37 | 18+32=50 90-50=40 |
在观察自行车的情景,请补全他们的对话。(填序号)
43+30= | 72+20= | 12+24= | 45-35= |
86-53= | 45-22= | 78-54= | 63+32= |
55+14= | 16+30= | 47-11= | 74-34= |
45+17+18= 62-26-34= 47-29+25=
36+19-25 68-(36+18) 75-29+38