问题
解答题
0.25×9.9=0.25×(10-1)=0.25×10-0.25.______.
答案
0.25×9.9,
=0.25×(10-0.1),
=0.25×10-0.25×0.1,
=2.5-0.025,
=2.475.
故答案为:错误.
0.25×9.9=0.25×(10-1)=0.25×10-0.25.______.
0.25×9.9,
=0.25×(10-0.1),
=0.25×10-0.25×0.1,
=2.5-0.025,
=2.475.
故答案为:错误.