A.190 | B.154 | C.200 |
A.1499 | B.600 | C.1500 | D.999 |
A.829-569 | B.829+569 | C.569+260 |
A.301 | B.133 | C.233 |
A.700 | B.900 | C.200 |
A.200 | B.210 | C.230 |
A.三位数 | B.四位数 | C.三位数或四位数 |
A.435 | B.871 | C.842 | D.624 |
A.108+297=405 | B.405-108=297 | C.297-108=405 |
A.900-472=428 | B.472+428=900 | C.472-428=44 |