问题
解答题
5.7×9.9=5.7×10-9.9×0.1.______.
答案
5.7×9.9,
=5.7×(10-0.1),
=5.7×10-5.7×0.1,
=57-0.57,
=56.43.
故答案为:错误.
5.7×9.9=5.7×10-9.9×0.1.______.
5.7×9.9,
=5.7×(10-0.1),
=5.7×10-5.7×0.1,
=57-0.57,
=56.43.
故答案为:错误.