A.97 | B.67 | C.76 |
A.25 | B.45 | C.15 |
A.20+12 | B.12+20 | C.20-12 |
A.20+19 | B.20+39 | C.20+29 |
A.89 | B.90 | C.99 |
A.一共有多少只鸟? |
B.树上还剩多少只鸟? |
C.树上原来有多少只鸟? |
A.54 ![]() | B.14 ![]() | C.36 |
A.56 | B.58 | C.57 |
A.6 | B.54 | C.72 |
A.51 | B.67 | C.68 |