问题 解答题
脱式计算.(能简算的要简算)
6.8×0.75÷0.513.5÷2.5-2.750.125×0.25×320.9+9.9+99.9+0.3.
答案

(1)6.8×0.75÷0.5,

=68×(0.75÷0.5),

=68×1.5,

=102;

(2)13.5÷2.5-2.75,

=5.4-2.75,

=2.65;

(3)0.125×0.25×32,

=0.125×0.25×4×8,

=(0.125×8)×(0.25×4),

=1×1,

=1;

(4)0.9+9.9+99.9+0.3,

=(1-0.1)+(10-0.1)+(100-0.1)+0.3,

=111-0.3+0.3,

=111.

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