1. 45 x 3 = _ A. 130 B. 135** C. 109 D. 135 Check

Right.

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To solve the equation 45 x 3, you need to multiply the numbers 45 and 3 together.

Here's how you can solve it:

Step 1: Multiply the digit in the ones place of the second number (3) by the first number (45).
- Multiply 3 by 5, which equals 15.

Step 2: Write down the product (15) below the line and leave space for the next product.

45
x 3
--------
15

Step 3: Multiply the digit in the tens place of the second number (3) by the first number (45).
- Multiply 3 by 4, which equals 12.

Step 4: Write down the product (12) above the line, shifted to the left one place.

45
x 3
--------
15
12

Step 5: Add the two products together.
- Add 15 and 120, which equals 135.

Therefore, the correct answer is B. 135