问题 解答题

用递等式计算,能简算的要简算.

(1)100.18-9.6+18.53

(2)0.963+23.89-0.063

(3)2.5×0.3÷2.5×0.3

(4)2.8×10.1

(5)51×1.2-1.2

(6)0.36×(15.23-9.63)

答案

(1)100.18-9.6+18.53,

=90.58+18.53,

=109.11;

(2)0.963+23.89-0.063,

=(0.963-0.063)+23.89,

=0.9+23.89,

=24.79;

(3)2.5×0.3÷2.5×0.3,

=2.5÷2.5×0.3×0.3,

=1×0.3×0.3,

=0.09;

(4)2.8×10.1,

=2.8×(10+0.1),

=2.8×10+2.8×0.1,

=28+0.28,

=28.28;

(5)51×1.2-1.2,

=(51-1)×1.2,

=50×1.2,

=60;

(6)0.36×(15.23-9.63),

=0.36×5.6,

=2.016.

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