1、563—397的简便方法:
=563 - (400 - 3)
=563 - 400 + 3
=163 +3
=166
2、 563—397的简便方法:
=(400 + 163)- 397
=400 - 397 + 163
=3 + 163
=166
3、563—397的简便方法:
=(570- 7)- (400 - 3)
=570 - 400 - 7 + 3
=170 - 7 + 3
=166
时间:2026-02-14 13:10:42
1、563—397的简便方法:
=563 - (400 - 3)
=563 - 400 + 3
=163 +3
=166
2、 563—397的简便方法:
=(400 + 163)- 397
=400 - 397 + 163
=3 + 163
=166
3、563—397的简便方法:
=(570- 7)- (400 - 3)
=570 - 400 - 7 + 3
=170 - 7 + 3
=166