6和7的加减法1. 口算。5 +( ) = 6 1 + ( ) = 6 4 + 2 = ( ) 2 + ()= 6( ) - 1 = 6 7 - 6 = ( ) 6 - () = 4 ( ) - 4 = 22.连一连。7 4 0 7 - 6 7 - 03 + 3 2 4 + 3 7 - 16 - 4 3 5 + 1 2 + 36 - 6 6 7 - 2 1 - 03.看图列式计算。4.在 里填上“”、“、=、=、