小学一年级数学(上)《连加连减》练习题一、填一填。 1、在下面的里填上适当的数。4 + 1 + 1 = 6 + 1 + 2 = 9 – 2 – 2 = 10 – 4 – 4 =2、看图写算式。 = = = = = =二、连一连。 三、在括号里填上适当的数。4 + 5 + ( )=9 ( )+ 1 + 3 = 8 ( )– 2 – 3 = 5 10 – 4 – ( )=3 9 – 3 – ( )=3 ( )+ 5 + 0= 6( )+ 0 + 6 = 8 7 – 1 – ( )=2 3 + 5 + ( )= 9( )– 4 – 3 = 0 ( )– 3 – 4 = 1 5 + 0 + ( )= 9