问题
解答题
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答案
(1)540÷(442-32×11),
=540÷(442-352),
=540÷90,
=6;
(2)250-250÷50,
=250-5,
=245;
(3)125×88,
=125×8×11,
=1000×11,
=11000;
(4)653-219-81-53,
=653-53-(219+81),
=600-300,
=300;
(5)99×45+45,
=(99+1)×45,
=100×45,
=4500;
(6)325÷13×(276-250),
=25×26,
=25×2×13,
=50×13,
=650.