Multiplying by 10, 100, and 1,000 for 4th Grade
Multiplying by 10, 100, or 1,000 shifts each digit one, two, or three places to the left, which is why zeros appear at the end. Understanding it as a place value shift rather than adding zeros keeps it working with decimals later. Practice problems and answers follow.
DETAILED EXPLANATION
When we multiply a whole number by 10, 100, or 1,000, we can think of shifting digits left or adding zeros. 42 × 10 = 420; 42 × 100 = 4,200; 42 × 1,000 = 42,000.
WORKED EXAMPLES WITH STEP BY STEP SOLUTIONS
Example 1
Find 35 × 100.
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Solutions:
Step 1: Apply the concept from the lesson above.
Step 2: Carry out the operation or reasoning.
Answer: 35 × 100 = 3,500
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