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20 以内的加法1+121+23 2+131+34 2+24 3+141+45 2+35 3+25 4+151+56 2+46 3+36 4+26 5+161+67 2+57 3+47 4+37 5+27 6+171+78 2+68 3+58 4+48 5+38 6+28 7+181+89 2+79 3+69 4+59 5+49 6+39 7+29 8+191+910 2+810 3+710 4+610 5+510 6+410 7+310 8+210 9+1101+1011 2+911 3+811 4+711 5+611 6+511 7+411 8+311 9+2111+1112 2+1012 3+912 4+812 5+712 6+612 7+512 8+412 9+3121+1213 2+1113 3+1013 4+913 5+813 6+713 7+613 8+513 9+4131+1314 2+1214 3+1114 4+1014 5+914 6+814 7+714 8+614 9+5141+1415 2+1315 3+1215 4+1115 5+1015 6+915 7+815 8+715 9+6151+1516 2+1416 3+1316 4+1216 5+1116 6+1016 7+916 8+816 9+7161+1617 2+1517 3+1417 4+1317 5+1217 6+1117 7+1017 8+917 9+8171+1718 2+1618 3+1518 4+1418 5+1318 6+1218 7+1118 8+1018 9+9181+1819 2+1719 3+1619 4+1519 5+1419 6+1319 7+1219 8+1119 9+10191+1920 2+1820 3+1720 4+1620 5+1520 6+1420 7+1320 8+1220 9+112020 以内的减法10-199-18 10-288-17 9-27 10-377-16 8-26 9-36 10-466-15 7-25 8-35 9-45 10-555-14 6-24 7-34 8-44 9-54 10-644-13 5-23 6-33 7-43 8-53 9-63 10-733-12 4-22 5-32 6-42 7-52 8-62 9-72 10-822-11 3-21 4-31 5-41 6-51 7-61 8-71 9-81 10-9111-110 12-111 13-112 14-113 15-114 16-115 17-116 18-117 19-11811-29 12-210 13-211 14-212 15-213 16-214 17-215 18-216 19-21711-38 12-39 13-310 14-311 15-312 16-313 17-314 18-315 19-31611-47 12-48 13-49 14-410 15-411 16-412 17-413 18-414 19-41511-56 12-57 13-58 14-59 15-510 16-511 17-512 18-513 19-51411-65 12-66 13-67 14-68 15-69 16-610 17-611 18-612 19-61311-74 12-75 13-76 14-77 15-78 16-79 17-710 18-711 19-71211-83 12-84 13-85 14-86 15-87 16-88 17-89 18-810 19-81111-92 12-93 13-94 14-95 15-96 16-97 17-98 18-99 19-910
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