Lesson Steps:

180-125
Ones digit of 180: 0
Ones digit of 125: 5
Tens digit of 180: 8
Tens digit of 125: 2
Hundreds digit of 180: 1
Hundreds digit of 125: 1

We subtract the ones digits first, i.e., 0-5. But 0 is smaller than 5. Hence, we need to borrow 1 from the tens place of 180. So, the tens digit of 180, 8 becomes 7. Ones digits 0 becomes 10 because we borrowed from the tens place
Ones digits: 10-5 = 5
Tens digit: 7-2=5
Hundreds digit: 1-1=0

Combining the digits: 055

Answer:

55

Grade: 1
Level: Primary
Subject: Math
Topic: Subtraction