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Double Digit Doubles

Practice addition facts in which the two double digit numbers being added are the same.
AB
11+1122
12+1224
13+1326
14+1428
15+1530
16+1632
17+1734
18+1836
19+1938
20+2040
21+2142
22+2244
23+2346
24+2448
25+2550
30+3060
40+4080
50+50100
60+60120
70+70140
80+80160
90+90180
10+1020

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