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Grade 4 Math · World 3: Multiplication Mill · Level 28
Bigger Numbers Times One Digit
Multiply up to four digits by one digit with partial products.
Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.
What children learn in Level 28
- Bigger numbers split the same way. For 3 times 2,415, split 2,415 by place value: 2,000, 400, 10, and 5.
- Multiply each part by 3. These are called partial products: 6,000, 1,200, 30, and 15.
- Add the partial products: 6,000 plus 1,200 is 7,200. Plus 30 is 7,230. Plus 15 is 7,245!
Georgia's K-12 Mathematics Standards:
- 4.NR.2.3 — Solve relevant problems involving multiplication of a number with up to four digits by a 1-digit whole number or involving multiplication of two two-digit numbers using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.