45.3+29.9= (简算)
问题描述:
45.3+29.9= (简算)
答
45.3+29.9
=45.3+3.-0.1
=75.3-0.1
=75.2
45.3+29.9= (简算)
45.3+29.9
=45.3+3.-0.1
=75.3-0.1
=75.2