问题
解答题
75×99=75×100-75.______.
答案
75×99,
=75×(100-1),
=75×100-75×1,
=7500-75,
=7425;
所以75×99=75×100-75;
故答案为:√.
75×99=75×100-75.______.
75×99,
=75×(100-1),
=75×100-75×1,
=7500-75,
=7425;
所以75×99=75×100-75;
故答案为:√.