1、求未知数求未知数开火车,算一算开火车,算一算9 95 510103 310105 510102 210101 110106 6474895开火车,算一算开火车,算一算3 + 4 = 5 + 5 = 7 + 3 = 7 2 = 5 + 4 = 6 + 3 = 4 + 4 = 3 + 7 =8 6 = 6 + 4 = 8 5 = 10 5 =5 + 5 = 10 6 = 8 + 2 = 7 + 2 =5 + 3 = 10 3 = 10 1 = 2 + 7 = 71010599810101010284735999你是怎样想你是怎样想的呢?的呢?8 + ( )= 10再放几个是再放几个是1010个?个
2、?8 8101010 8 = 222未知数未知数例例小朋友,这个小朋友,这个盒子能装几个盒子能装几个苹果呢?苹果呢?再放几个就是再放几个就是 10个?个?3=10+ ( )7再放几个就是再放几个就是 10个?个?6+( ) =1041 1、看图填数、看图填数2 2、用加法、用加法3 3、用减法、用减法4 4、用分与合、用分与合如何求未知数如何求未知数1、5+( )=8( )+6=107+( )=83+( )=936149+( )=103+( )=105+( )=92、看算式,画画填填。1744、2 +( )=10( )+ 9 =10( )+ 3 =74 +( )=981545、975316、1
3、05 =36+( )=96+( )=9( )+5 =9( )+5 =942+( )=102+( )=106+( )=96+( )=9( )+5 =9( )+5 =982+( )=102+( )=10( )+5 =9( )+5 =96+( )=66+( )=602+( )=102+( )=106+( )=66+( )=62+( )=3+42+( )=3+42+( )=72+( )=755( )+ 3 = 5 + 45 + 4 966+( )=66+( )=62+( )=3+42+( )=3+4( )+4( )+47 72103+( )3+( )5 5( )+4( )+47 7 3+( )3+( )5 5.6543p 经常不断地学习,你就什么都知道。你知道得越多,你就越有力量p Study Constantly, And You Will Know Everything. The More You Know, The More Powerful You Will Be写在最后感谢聆听不足之处请大家批评指导Please Criticize And Guide The Shortcomings结束语讲师:XXXXXX XX年XX月XX日