问题
解答题
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答案
(1)827-98-102,
=827-(98+102),
=827-200,
=627;
(2)378+169+22,
=378+22+169,
=400+169,
=569;
(3)475-197,
=(475+3)-(197+3),
=478-200,
=278;
(4)15×(512-478),
=15×34,
=510;
(5)819÷(270-261),
=819÷9,
=91;
(6)540÷45×230,
=12×230,
=2760.