Correct, 800+20+2, 700+40+3, 3+90+100, 30+8+900, 10+8, 20+9, 30+9+300, 10+9+800, 200+90+3, 400+60+9, 100+2+20, 200+30+4, 300+40+8, 7+80+500, 400+7+30, 9+600+50, 700+20+9, 90+800+4, 900+7+40, 1000+400+80+9, Incorrect, 820, 82, 12, one-hundred twenty-five, twenty-nine, eleven, 6, fifty-five, 19, fourteen, 1, two, three-hundred, 999, 7700, 00 99 00, 16+0=16, 22+1=23, 44, 90-10=80

Expanded Form Practice

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