19．
0 158041 158049 158055 158059 158065 158067 158071 158077 158079 158085 158091 158095 158097 158101 158107 158109 158115 158119 158121 158125 158127 158131 158133 158135 158136 158137 158139 158140 158141 158143 158145 158149 158151 158155 158157 158161 158167 158169 158175 158179 158181 158185 158191 158197 158199 158205 158209 158211 158217 158221 158227 158235 199269
| 口算 101×7= | 420×2= | 127+222= | 210-110= | 5900×0= |
| 999-996= | 1000-1000= | 32÷4= | 132×3= | 900-280= |
| 44×5= | 100×6= | 777-555= | 1×895= |