7.8,8,9怎么算24
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7.8,8,9怎么算247.8,8,9怎么算247.8,8,9怎么算241:8-(7-9)×82:8-((7-9)×8)3:8-(8×(7-9))4:8-8×(7-9)5:8+(8×(9-7))6:8
7.8,8,9怎么算24
7.8,8,9怎么算24
7.8,8,9怎么算24
1:8 - (7 - 9) × 8
2:8 - ((7 - 9) × 8)
3:8 - (8 × (7 - 9))
4:8 - 8 ×(7 - 9)
5:8 + (8 × (9 - 7))
6:8 + 8 ×(9 - 7)
7:8 + (9 - 7) × 8
8:8 + ((9 - 7) × 8)
9:(8 × (9 - 7)) + 8
10:8 × (9 - 7) + 8
11:(9 - 7) × 8 + 8
12:((9 - 7) × 8) + 8