忆雪儿
幼苗
共回答了20个问题采纳率:90% 举报
(1-2+ 3)× 4 =8
-1+2+3×4-5 =8
-1×2×3+4×5-6 =8
-(1+2+3×4)+ 5×6-7 =8
1-2+3+4-5+6-7+8 =8
注:
(1-2+ 3)× 4 =2×4=8
-1+2+3×4-5 =1+12-5=13-5=8
-1×2×3+4×5-6 =-6+20-6=20-12=8
-(1+2+3×4)+ 5×6-7 =-(3+12)+30-7=-15+30-7=30-22=8
1-2+3+4-5+6-7+8 =(1-2)+3+(4-5)+(6-7)+8=-1+3-1-1+8=3-3+8=8
1年前
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