An odd number of groups ends in 5. An even number of groups ends in 0.
- 5 1 group ends in 5
- 10 2 groups ends in 0
- 15 3 groups ends in 5
- 20 4 groups ends in 0
- 25 5 groups ends in 5
- 30 6 groups ends in 0
Each problem multiplies 5 by a number from 1 to 12.
You’ll practice all 12 problems from 5 × 1 through 5 × 12, with answers from 5 to 60.
As the table continues, the answers alternate between ending in 5 and ending in 0.
Typical level: Grade 3 and beyondThe U.S. Common Core expects Grade 3 students to know products of two one-digit numbers from memory. This practice continues through ×12. Curriculum timing varies.
An odd number of groups ends in 5. An even number of groups ends in 0.
Each answer is also half of the 10s answer: 5 × 8 is half of 10 × 8.