Grades Grade 3 Base Ten OperationsMultiplying by Multiples of 10

Multiplying by Multiples of 10

🔢 Base Ten Operations

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Multiplying by Multiples of 10

Multiply single-digit numbers by tens using place value patterns!

When we multiply a single-digit number by a multiple of 10 (like 20, 30, 40 …), we use what we know about basic facts and just attach a zero. 6 × 8 = 48, so 6 × 80 = 480!

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6 × 80 = 6 × 8 tens = 48 tens = 480

How to multiply by a multiple of 10:

1Ignore the zero in the multiple of 10 for now

2Multiply the single digits (e.g., 6 × 8 = 48)

3Attach one zero to the product (48 → 480)

4That is your answer!

Pattern: multiplying by 10s

4×1=44×10=404×20=804×30=1204×40=1604×50=200

Each product jumps by 40 as the tens digit increases by 1.

🏭Factory packing boxes

A factory packs 7 items per box.
There are 50 boxes.
7 × 50 = ?
7 × 5 = 35 → attach a zero → 350
The factory packs 350 items total!

7 \times 50 = 350

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Remember This!

Remember: multiples of 10 end in zero. After you multiply the leading digits, count how many zeros are in the multiple of 10, and add that many zeros to your basic-fact product.

✏️ Try It!

What is 9 × 60?

Practice with CalcVerse

⬛Multiplication Grid

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