9的乘加乘减（2023-09-18）

9的乘加乘减（2023-09-18）：9×4-7= 9×3-1= 9×9+4= 4×9-3= 2×9+8= 5×9-2= 8×9+0= 9×4+9= 9×3-1= 9×5+5= 9×3-3= 2×9-2= 5×9-2= 8×9+9= 1×9-2= 9×2+5= 9×5+5= 9×4-8= 9×6+1= 1×9-6= 2×9+1= 3×9+9= 5×9+8= 9×5-10= 9×4-6= 9×5+7= 9×2-1= 2×9-1= 5×9-7= 3×9+3= 7×9-7= 9×5+5= 9×1-2= 9×4+9= 9×6-1= 3×9-6= 6×9-4= 7×...