范文 |
一年级数学20以内的口算练习题及答案 一年级数学口算20以内的'填括号 
(1)( ) - 10 = 2 (2)14 - ( )= 10 (3)17 +( ) = 18 (4)7 + ( )= 20 (5) ( )- 5 = 3 (6)18 -( ) = 7 (7)( ) - 10 = 4 (8)( ) - 4 = 9 (9)1 +( ) = 11 (10)15 -( ) = 1 (11)3 -( ) = 1 (12)( ) + 3 = 12 (13)( ) - 11 = 5 (14)( ) - 2 = 3 (15)18 -( ) = 3 20以内的填括号参考答案 (1)(12) - 10 = 2 (2)14 - (4)= 10 (3)17 +(1) = 18 (4)7 + (13)= 20 (5) (8)- 5 = 3 (6)18 -(11) = 7 (7)(14) - 10 = 4 (8)(13) - 4 = 9 (9)1 +(10) = 11 (10)15 -(14) = 1 (11)3 -(2) = 1 (12)(9) + 3 = 12 (13)(16) - 11 = 5 (14)(5) - 2 = 3 (15)18 -(15) = 3 |