CK-12 Foundation
Ck 12: Arithmetic: Sums of Mixed Numbers With Renaming
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the difference of mixed numbers by using borrowing and renaming. Students examine guided notes, review guided practice, watch...
Illustrative Mathematics
Illustrative Mathematics: 4.nbt to Regroup or Not to Regroup
Sometimes when we subtract one number from another number we "regroup," and sometimes we don't. For example, if we subtract 38 from 375, we can "regroup" by converting a ten to 10 ones: Aligns with 4.NBT.B.