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脱式计算124×5+159÷3185+(450-400)÷5279+(345-145×2)1000-(75×3+763)
题目详情
脱式计算
124×5+159÷3
185+(450-400)÷5
279+(345-145×2)
1000-(75×3+763)
124×5+159÷3
185+(450-400)÷5
279+(345-145×2)
1000-(75×3+763)
▼优质解答
答案和解析
(1)124×5+159÷3
=620+53
=673;
(2)185+(450-400)÷5
=185+50÷5
=185+10
=195;
(3)279+(345-145×2)
=279+(345-290)
=279+55
=334;
(4)1000-(75×3+763)
=1000-(225+763)
=1000-988
=12.
=620+53
=673;
(2)185+(450-400)÷5
=185+50÷5
=185+10
=195;
(3)279+(345-145×2)
=279+(345-290)
=279+55
=334;
(4)1000-(75×3+763)
=1000-(225+763)
=1000-988
=12.
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