1) 123,234- 56,233 2) 674,234-23,454 3) 120,675+23,456 4) 145,023-120,456 5) 567,834-62,565 6) 145,238-50,454 7) 345,984+784,485 8) 254,696+254,696 9) 145,485-45,776 10) 345,765-234,643 11) 165,654-23,565 12) 674,345+643,345

Regrouping with Addition and Subtraction

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