Worked Example 1
Times a Multiple of 10
8 × 40
- 140 is 4 tens.
- 28 × 4 tens = 32 tens
- 332 tens is 320.
Answer: 320
Florida Grade 3 Math · Number Sense and Operations
MA.3.NSO.2.3: Multiplying by Multiples of 10 and 100
What this Grade 3 benchmark means, worked examples, common mistakes, and a free printable worksheet.
Created by a Florida mom · Published by Tropical Learning LLC
What Is Benchmark MA.3.NSO.2.3?
Students multiply a one-digit number by a multiple of 10 (up to 90) or a multiple of 100 (up to 900), using place value.
For example, 6 × 70 is 6 × 7 tens = 42 tens = 420, and 6 × 300 is 6 × 3 hundreds = 18 hundreds = 1,800.
Official benchmarkMultiply a one-digit whole number by a multiple of 10, up to 90, or a multiple of 100, up to 900, with procedural reliability.
On the FAST test: part of the Grade 3 reporting category Number Sense and Multiplicative Reasoning, which is about 23–29% of the test.
Worked Examples
Worked Example 2
Times a Multiple of 100
7 × 500
- 1500 is 5 hundreds.
- 27 × 5 hundreds = 35 hundreds
- 335 hundreds is 3,500.
Answer: 3,500
Common Mistakes to Watch For
Dropping the zero
Wrong:5 × 60 = 30
5 × 6 tens = 30 tens, and 30 tens is 300.
Adding an extra zero when the basic fact ends in zero
Wrong:5 × 80 = 4,000
5 × 8 = 40, so 5 × 8 tens = 40 tens = 400.
Helpful Math Tip
Say it in units: "4 times 3 hundreds is 12 hundreds." Naming the unit (tens or hundreds) keeps the zeros correct.
Related Grade 3 Skills
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Help your child build math confidence with original interactive questions aligned with Florida's B.E.S.T. Mathematics Standards.
Start Practicing FreeIndependent Educational Platform. FastChomp is published by Tropical Learning LLC and is not affiliated with, sponsored by, or endorsed by the Florida Department of Education. FAST and Star assessment names are referenced for informational purposes only. FastChomp practice questions are original educational materials, not official Florida FAST assessment questions.