Multiplying by Multiples of 10 - Elementary Math The extension provides an opportunity for students to multiply single digit numbers by higher multiples of 10, such as 40, 50, and 60. Part 1 Let's multiply single digit numbers by 10. Here we go! Examples: 1 × 10 (10) 8 × 10 (80) 2 × 10 (20) 3 × 10 (30) 6 × 10 (60) 9 × 10 (90) 4 × 10 (40)