问题 解答题

递等式计算.

(1)6129-(715+1129)-285

(2)3279+481÷37

(3)6868÷34×720

(4)13320-222×56.

答案

(1)6129-(715+1129)-285,

=6129-715-1129-285,

=(6129-1129)-(715+285),

=5000-1000,

=4000;

(2)3279+481÷37,

=3279+13,

=3292;

(3)6868÷34×720,

=202×720,

=145440;

(4)13320-222×56,

=13320-12432,

=888.

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