1、 20 以内进位加法口诀表20 以内退位减法口诀表11 - 9 = 2 11 - 8 = 3 11 - 7 = 4 11 - 6 = 5 11 - 5 = 6 11 - 4 = 7 11 - 3 = 8 11 - 2 = 9 12 - 9 = 3 12 - 8 = 4 12 - 7 = 5 12 - 6 = 6 12 - 5 = 7 12 - 4 = 8 12 - 3 = 9 13 - 9 = 4 13 - 8 = 5 13 - 7 = 6 13 - 6 = 7 13 - 5 = 8 13 - 4 = 9 14 - 9 = 5 14 - 8 = 6 14 - 7 = 7 14 - 6 = 8
2、14 - 5 = 9 15 - 9 = 6 15 - 8 = 7 15 - 7 = 8 15 - 6 = 9 16 - 9 = 7 16 - 8 = 8 16 - 7 = 9 17 - 9 = 817 - 8 = 9 18 - 9 = 9 9 + 2 = 118 + 3 = 117 + 4 = 116 + 5 = 115 + 6 = 114 + 7 = 113 + 8 = 112 + 9 = 119 + 3 = 128 + 4 = 127 + 5 = 126 + 6 = 125 + 7 = 124 + 8 = 123 + 9 = 129 + 4 = 138 + 5 = 137 + 6 = 13
3、6 + 7 = 135 + 8 = 134 + 9 = 139 + 5 = 148 + 6 = 147 + 7 = 146 + 8 = 145 + 9 = 149 + 6 = 158 + 7 = 157 + 8 = 156 + 9 = 159 + 7 = 168 + 8 = 167 + 9 = 169 + 8 = 178 + 9 = 179 + 9 = 1820 以内进位加法退位减法口诀表2+9 3+9 4+9 5+9 6+9 7+9 8+9 9+93+8 4+8 5+8 6+8 7+8 8+8 9+84+7 5+7 6+7 7+7 8+7 9+7119 5+6 6+6 7+6 8+6 9+6129 118 6+5 7+5 8+5 9+5139 128 117 7+4 8+4 9+4149 138 127 116 8+3 9+3159 148 137 126 115 9+2169 158 147 136 125 114179 168 157 146 135 124 113189 178 167 156 145 134 123 112
