A.290 | B.390 | C.620 |
A.572-183 | B.72+183+572 | C.572+572-183 |
A.加120 | B.减120 | C.加90 | D.减90 |
A.个位 | B.百位 | C.十位 |
A.488+50 | B.159+218 | C.612-199 |
A.170 | B.160 | C.150 | D.140 |
A.229+314 | B.314-229 | C.543+314 |
A.412+36 | B.412+36+412 | C.412-36+412 |
A.236+259 | B.936-259 | C.784-420 |
A.284+529 | B.813+529 | C.813+284 |