一、比一比,看谁算得又对又快。
9+1 = 4+2 = 10-3 = 5-5 = 3+5 =
4+4 = 7-7+2 = 6+2-4 = 8+0+1 = 9-0-6 =
二、我会填。
(1)谁的火车开得快?
10→ → → → 9→ → → →
(2)
4-( )= 3 ( )+3 = 3 ( )+2 = 7
( )-0 = 2 ( )+1 = 7 ( )-9 = 0
0+( )= 6 ( )-0 = 9 ( )﹢7 = 10
( )-( )= 3 ( )+( )=( ) ( )-( )=( )
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