简便计算:4.3-2.45+5.7-4.55
问题描述:
简便计算:4.3-2.45+5.7-4.55
答
太简单啦,4.3+5.7-(2.45+4.55)=10-7=3
答
4.3-2.45+5.7-4.55=4.3+5.7-(2.45+4.55)=10-7=3
答
=1.85+5.7-4.55
==7.55-4,55
=3
答
=(4.3+5.7)-(2.45+4.55)
=10-7
=3
答
4.3-2.45+5.7-4.55
=4.3+5.7-(2.45+4.55)
=10-7
=3