Let's Revise 1 + 5 =( ) 8 + 0 =( 4 + 0 =( 3 + 5 =[ -- 4 + 1 =[ 6 + 3 =[ _ _____,, -- 3 + 4 =( ) 5 + 3 =[ 3 + 1 = _( _____,. 2 + 0 =[ 2 + 5 = _( _____,. 7 + 2 =[ 3 + 1 =( ) 0 + 7 =(