问题 解答题
简算.
648-187-113375-(175+94)642-298486+598.
答案

(1)648-187-113

=648-(187+113)

=648-300

=348;

(2)375-(175+94)

=375-175-94

=200-94

=106;

(3)642-298

=642-(300-2)

=642-300+2

=342+2

=344;

(4)486+598

=486+600-2

=1086-2

=1084.

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