Lesson Steps:

1) I solve the multiplication 0.5 x 0.4 as in the picture, without taking into account the comma

2) I count the decimal digits in 0.5 and 0.4, which in this case are 2; for every decimal digit, divide the result of multiplication /10, that is 20/10/10 = 0.2

Answer:

0.2

Grade: 5
Level: Primary
Subject: Math
Topic: Exponents