问题 解答题
脱式计算,能简算的要简算.
20-9.18-0.826.53-(1.53+2.6)5.52-1.074-0.9264.21+1.04+0.79.
答案

解(1)20-9.18-0.82,

=20-(9.18+0.82),

=20-10,

=10.

(2)6.53-(1.53+2.6),

=6.53-1.53-2.6,

=4-2.6,

=1.4.

(3)5.52-1.074-0.926,

=5.52-(1.074+0.926),

=5.52-2,

=3.52.

(4)4.21+1.04+0.79,

=4.21+0.79+1.04,

=5+1.04,

=6.04.

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