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2nd Grade Math
Number and Operations
13. TX.2.6.A
13.8 Multiplying digits with 5 and 10 up to 99
Multiplying by 5 and 10 up to 99
Discover simple patterns for multiplying by 5 and 10, from skip counting to spotting the ending-digit pattern in products up to 99.
What You'll Learn
Recognize that multiplying by \(10\) always adds a zero, so \(7 \times 10 = 70\)
Identify that multiplying by \(5\) always gives a product ending in \(0\) or \(5\)
Apply skip counting by fives or tens to find products such as \(6 \times 5 = 30\)
Use arrays and repeated addition to check that \(4 \times 10 = 10 + 10 + 10 + 10\)
Compare turnaround facts like \(5 \times 9 = 9 \times 5\) to multiply in either order
Solve two-digit by 5 or 10 problems while keeping products under 100, such as \(13 \times 5 = 65\)
What You'll Practice
1
Completing multiplication fact tables for 5s and 10s
2
Multiplying two-digit numbers by 5
3
Multiplying two-digit numbers by 10
Why This Matters
Mastering multiplication by 5 and 10 builds your mental math speed and number sense. These patterns appear constantly in everyday situations like calculating money, measuring, telling time, and estimating quantities quickly.
This Unit Includes
Practice exercises
Learning resources
Skills
Multiplication
Mental Math
Number Patterns
Basic Facts
Times Tables
TX Curriculum Aligned