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Addition Within 20 Worksheet

Grade-1 addition facts with sums to 20, including the make-ten set, printable with answer key.

1.2+72.6+103.3+54.6+45.3+66.7+97.4+28.9+59.5+1010.9+211.2+312.2+413.9+814.8+215.10+416.2+817.8+618.1+119.2+620.10+821.1+622.9+423.6+824.6+1
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1.2+792.6+10163.3+584.6+4105.3+696.7+9167.4+268.9+5149.5+101510.9+21111.2+3512.2+4613.9+81714.8+21015.10+41416.2+81017.8+61418.1+1219.2+6820.10+81821.1+6722.9+41323.6+81424.6+17
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Teaching notes

This range contains every make-ten fact (9+6, 8+7…). If a student is still counting all by January, circle the tens-plus facts and reteach make-ten before speed work.

Common Core: 1.OA.C.6

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