Lesson eLearning

Write the number that consists of 9 tens and 3 units. If we double this number, what is the resulting number?

hard 3 marks Class 2 · Mathematics · Counting in Tens
Answer
186

The correct answer is 186 — The resulting number after doubling is 186.

Step-by-step solution

  1. 9 tens = 9×10 = 90.
  2. Add the 3 units: 90 + 3 = 93.
  3. Double 93: 93×2 = 186.
  4. The resulting number after doubling is 186.
Common mistake: Adding 9 and 3 instead of 90 and 3, giving 12

Concept tested: Forming numbers from tens and units

Published · How this solution was prepared and checked

← All Counting in Tens questions