3 - 1 + 2 =, 5 - 3 + 2 =, 8 - 1 +7 =, 6 - 3 + 3 =, 9 - 5 + 4 =, 10 - 0 + 10 =, 11 - 9 + 2 =, 12 - 7 + 5 =, 13 - 6 + 7 =, 14 - 8 + 6 =, 18 - 9 + 9 =, 16 - 7 + 9 =, 15 - 8 + 7 =, 2 - 3 +( ) = 5, 4 - 2 +( )= 6, 1 - ( )+ 7 = 8, 7 - ( )+ 4 =11,

一年级数学。加法

排行榜

視覺風格

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