解
=(12.4+12.6)+(6.7+3.3)
=25+10
=35
祝你学习进步
12.4+6.7+3.3+12.6
=12.4+12.6+6.7+3.3
=(12.4+12.6)+(6.7+3.3)
=25+10
=35
以上就是简便计算过程。
12.4-22.78÷3.4
=12.4-(20.4+2.38)÷3.4
=12.4-(20.4÷3.4+2.38÷3.4)
=12.4-(6+0.7)
=12.4-6.7
=5.7
12.4+6.7+3.3+12.6用简便方法怎么计?
12.4+6.7+3.3+12.6
=(12.4+12.6)+(6.7+3.3)
=25+10
=35
12.4+(10.28-2.68)用简便方法怎么做? 12.4+(10.28-2.68)=12.4+10.28-2.68=24.68-2.68=22