问题 解答题
用递等式计算(能简算的要简算)
5.03-2.5+0.9635.72-(5.9+5.72)25-4.7+5.31.3+2.83+8.7+0.172.47-2.2-3.8+7.53.
答案

(1)5.03-2.5+0.96,

=2.53+0.96,

=3.49;

(2)35.72-(5.9+5.72),

=35.72-5.9-5.72,

=35.72-5.72-5.9,

=30-5.9,

=24.1;

(3)25-4.7+5.3,

=20.3+5.3,

=25.6;

(4)1.3+2.83+8.7+0.17,

=(1.3+8.7)+(2.83+0.17),

=10+3,

=13;

(5)2.47-2.2-3.8+7.53,

=(2.47+7.53)-(2.2+2.8),

=10-5,

=5.

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