问题
解答题
5×1.3÷5×1.3
99×10.1
58×10.1-5.8
128.8÷23+9.2×0.35.
答案
(1)5×1.3÷5×1.3,
=6.5÷5×1.3,
=1.3×1.3,
=1.69;
(2)99×10.1,
=99×10+99×0.1,
=990+9.9,
=999.9;
(3)58×10.1-5.8,
=(10.1-0.1)×5.8,
=10×5.8,
=58;
(4)128.8÷23+9.2×0.35,
=5.6+3.22,
=8.82.