Subtract to 1,000 with 1 Regrouping 3-14
Use Base 10 discs and number bonds to subtract by regrouping once. What's 675-392? Compare hundreds, tens, and ones. Need more tens, so shift 100. Think of 675 as 500, 170, and 5. Since 500-300 = 200, 170-90 = 80, and 5-2 = 3, 675-392 = 283. Add the partial differences to get the total difference.
