问题 解答题
脱式计算(前3小道进行简便计算):
456+259+144923-458-142635+498
65×106+4508000-243×18(45+26)×264.
答案

(1)456+259+144,

=456+144+259,

=600+259,

=859;

(2)923-458-142,

=923-(458+142),

=923-600,

=323;

(3)635+498,

=635+500-2,

=1135-2,

=1133;

(4)65×106+450,

=6890+450,

=7340;

(5)8000-243×18,

=8000-4374,

=3626;

(6)(45+26)×264,

=71×264,

=18744.

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