Answer:

1.)

Step 1. Understand :

•What is asked in the problem?

How much will be his change.

•What are the given facts?

5, Php 20.50 and Php 200

Step 2. Plan

•What operation/s are we going to use?

Multiplication and Subtraction

•What is the mathematical sentence or equation?

20.50 x 5 = N

200 - N = N

Step 3. Solve

•Perform the equation

20.50 x 5 = 102.50

200 - 102.50 = 97.50 will be his change.

2.) 2.25 x 30.60 = Php 68.85

3.) 0.750 + 0.250 = 1

Step-by-step explanation:

HOPE IT HELPS!

Sórry I can't answer no.4 and no. 5