问题
解答题
脱式计算.
800-600÷12
780-480÷16
99×75.
答案
(1)800-600÷12
=800-50
=750;
(2)780-480÷16
=780-30
=750;
(3)99×75
=(100-1)×75
=100×75-1×75
=7500-75
=7425.
脱式计算.
800-600÷12
780-480÷16
99×75.
(1)800-600÷12
=800-50
=750;
(2)780-480÷16
=780-30
=750;
(3)99×75
=(100-1)×75
=100×75-1×75
=7500-75
=7425.