小學二年級數(shù)學口算題大全：整千數(shù)的加法

1000 + 1000 = 3000 + 3000 = 1000 + 5000 =
     1000 + 2000 = 1000 + 7000 = 3000 + 1000 =
     4000 + 1000 = 6000 + 3000 = 8000 + 1000 =
     3000 + 6000 = 4000 + 4000 = 3000 + 2000 =
     4000 + 1000 = 5000 + 2000 = 7000 + 1000 =
     1000 + 7000 = 2000 + 7000 = 4000 + 3000 =