subtract 3-digit numbers\nenter the numbers that are modeled with the base-10 blocks and their difference.

Explanation:

Step1: Identify the first number

A large square (hundreds place) has 100 blocks, a vertical strip (tens place) has 10 blocks, and a small square (ones place) has 1 block.
First number: 4 hundreds + 4 tens + 6 ones = (4\times100 + 4\times10 + 6\times1 = 400 + 40 + 6 = 446).

Step2: Identify the second number

Second number: 2 hundreds + 5 tens + 3 ones = (2\times100 + 5\times10 + 3\times1 = 200 + 50 + 3 = 253).

Step3: Subtract the two numbers

Subtract: (446 - 253 = 193).

Answer:

First number: 446, Second number: 253, Difference: 193