问题 解答题
怎样算简便就怎样算.
(1)4.32+5.43+6.68(2)15.17-6.8-3.2(3)34.82-(4.82+15.2)
(4)15.27+4.72-5.28(5)4.02-3.5+0.98(6)5.8-4.5+5.8-4.5.
答案

(1)4.32+5.43+6.68

=4.32+6.68+5.43,

=11+5.43,

=16.43;

(2)15.17-6.8-3.2

=15.17-(6.8+3.2),

=15.17-10,

=5.17;

(3)34.82-(4.82+15.2)

=34.82-4.82-15.2,

=30-15.2,

=14.8;

(4)15.27+4.72-5.28

=19.99-5.28,

=14.71;

(5)4.02-3.5+0.98

=4.02+0.98-3.5,

=5-3.5,

=1.5;

(6)5.8-4.5+5.8-4.5

=5.8+5.8-(4.5+4.5),

=11.6-9,

=2.6.

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