zerlan
春芽
共回答了18个问题采纳率:88.9% 举报
(1)743-450÷18×25,
=743-25×25,
=743-625,
=118;
(2)88×
2
3 ×(1÷
3
4 -1),
=88×
2
3 ×(
4
3 -1),
=88×
2
3 ×
1
3 ,
=
176
3 ×
1
3 ,
=19
5
9 ;
(3)519.2÷(24.3×2-4.6),
=519.2÷(48.6-4.6),
=519.2÷44,
=11.8;
(4)126×98+126+63×2,
=126×98+126+126,
=126×(98+1+1),
=126×100,
=12600.
1年前
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