A.800-234+156 | B.800-(234+156) |
C.800+234-156 |
A.108+34+108 | B.108-34+108 | C.108+34 |
A.278+222 | B.858-278-222 |
C.858-(278+222) |
A.4 | B.5 | C.6 |
A.129 | B.268 | C.397 | D.404 |
A.286+280-320 | B.286+320-280 | C.286-280+320 |
A.10 | B.11 | C.12 |
A.73-(46-14) | B.73-(46+14) | C.73-46+14 |
A.485+278+172 | B.485-278+172 | C.48-278-172 |
A.减325 | B.先加325再加325 | C.先减325再减325 |