问题 解答题
选择合适的方法计算
①7.8÷0.26÷0.3②5.4+4.6÷0.2③1.43×2.5+0.57×2.5④10.8÷0.27×4.
答案

①7.8÷0.26÷0.3,

=7.8÷(0.26×0.3),

=7.8÷0.078,

=100;

②5.4+4.6÷0.2,

=5.4+23,

=28.4;

③1.43×2.5+0.57×2.5,

=(1.43+0.57)×2.5,

=2×2.5,

=5;

④10.8÷0.27×4,

=40×4,

=160.

解答题
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