This document provides examples and steps for solving two-step word problems involving addition and subtraction of whole numbers and money. It includes sample problems such as calculating the number of mangoes left after combining amounts picked and sold. The document also outlines George Polya's four-step approach to problem solving: understand the problem, make a plan, carry out the plan, and look back. Sample problems are then shown being solved using this approach.

1. Solving Two-step
Words Problems
Involving Addition
And Subtraction Of
Whole Numbers
Including Money

2. •600 - 426 = _____
•900 - 810 = _____
•2 000 - 1 593 = _____

3. 12 - 5 11 + 6 14 - 8
18 - 9 16 + 9 13 + 4

4. Mang carlos picked 115
yellow mangoes and 73
green mangoes. He sold 56
mangoes in all. How many
mangoes were left to him?

5. 4 STEPS ON PROBLEM SOLVING
ACCORDING TO GEORGE POLYA
Understand
 What is asked?
What are given?
Plan
 What operation/s are needed to solve
the problem?
 What equation will solve the problem?

6. Solve
Look back
 Does your answer make sense?
Did you label it correctly?

7. Understand
 What is asked?
- Number of mangoes left to Mang
Carlo.
What are given?
- 115 yellow mangoes, 73 green
mangoes, sold 56 in all

8. Plan
 What operation/s are needed to solve
the problem?
- Addition and subtraction
 What equation will solve the problem?
- 115 + 73 – 56 = n

9. Solve
Addition: 115
+ 73
188
Subtraction: 188
- 56
132 mangoes

10.  Look back
 Does your answer make sense?
- Yes, since 132 is less than the total.
- Yes, since 2 steps were used to find
the total number of mangoes first, then
the number of mangoes left.
Did you label it correctly?
- Yes

11. 1. Mr. Javier has to deliver 760 sacks of rice. He
delivered 510 to Mr. Rosales and 140 to Mr. Acosta.
How many more sacks of rice will be delivered?
2. After spending 75.00 for a shirt and 125.00 for a
pair of pants, Michelle had 50.00 left in her wallet.
How much money did she have at first?
3. There are 246 yellow mangoes and 152 green
ones. Out of these, 120 are in the basket and the rest
are in the crate. How many are in the crate?

12. Remember:
1. Understand the problem.
- Find the hidden question.
2. Make a plan.
3. Solve/carry out the plan.
4. Look back.

13. Answer the following problems using
polya's strategy.
1. Mr. Reyes gathered 365 mangoes on monday and
453 on tuesday. He sold 650 mangoes on
wednesday. How many mangoes were left unsold?
2. A farmer harvested 425 sacks of palay. He sold
258 sacks to buyer A and 120 to buyer B and kept
the rest for his family. How many sacks of palay were
left?

14. 3. Rita bought a dress for 235.00 and pair of
shoes for 574.00. She gave a 1 000-peso bill to
the cashier. How much is her change?
4. Alex wants to buy a t-shirt worth 185.00 and
a school bag worth 240.00. He has only
300.00. How much more money does he
need?

15. ASSIGNMENT:
• Solve the ffollowing:
1. There are 262 boys and 528 girls in grade three. Out
of these, 174 pupils are 10 years old. How many
pupils are not 10 years old?
2. Piano spelled 26 words correctly on monday, 25 on
wednesday and 37 on friday. If there are 100 words to
be spelled, how many words did she misspell?
3. Rosalinda bought a bag for 165.00 and a pair of shoes
for 395.00. How much change did she get from 1 000?