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.