Multiplication Story Problems

Solve multiplication problems, and estimate to check.

Warm-up, learn, try it together, practice, then a quick check. About 15 minutes.

What children learn in Level 30

A candy shop has 7 boxes of chocolates, with 16 chocolates in each box. How many chocolates? 7 groups of 16 is 7 times 16.
7 times 10 is 70, and 7 times 6 is 42. 70 plus 42 is 112 chocolates.
Check with an estimate: 16 is close to 20, and 7 times 20 is 140. 112 is close to 140, so it's reasonable. 1,120 would be far too many!

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.
4.NR.2.5 — Solve multi-step problems using addition, subtraction, multiplication, and division involving whole numbers. Use mental computation and estimation strategies to justify the reasonableness of solutions.