啊一声叹息
幼苗
共回答了15个问题采纳率:86.7% 举报
87×4-154÷7
=87×4-22
=2×(87×2-11)
=2×(174-11)
=2×163
=326
(174-74÷2)×4
=174×4-74×2
=(100 +74)×4-74×2
=400+74×4-74×2
=400+74×2
=400+148
=548
1030-(720-540÷18)
=1030-720+30
=1060-720
=340
(335-65)÷18×15
=270÷6×5
=45×5
=225
1年前
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