How Do You Use Math When Buying a House?

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Did you know that the same maths problems you practice in school, like adding numbers, calculating percentages, and solving word problems, are used by adults when they want to buy a house?

Yep, maths helps people make important decisions and keep track of their savings and spending.

Letโ€™s see how maths works in real life, why grown-ups use tools like CRM systems, and how all of this relates to what you learn in school.

When Buying a House

Close-up of a small, heart-adorned wooden house keychain resting on US dollar bills
Source: artlist.io/Screenshot, Math helps a lot in situations such as buying a house

Buying a house is a big step for many families and often takes a long time to plan.

Saving money, picking a suitable home, and checking costs all happen before any final decision is made.

Maths helps people compare options, check affordability, and avoid surprises later on. School-style calculations are used regularly, just with bigger numbers.

Many practical questions appear during the planning stage.

Some of the most common ones focus on money and timing, including:

  • How much does the house cost
  • How much money has already been saved
  • How much needs to be borrowed from a bank
  • How much needs to be paid each month

Questions like these are very similar to word problems seen in maths lessons.

A problem such as โ€œIf Lucy has ยฃ15 and buys 3 toys for ยฃ4 each, how much money will she have left?โ€ uses addition, subtraction, and logical thinking.

Adults rely on those same skills when working out house costs, loans, and payments.

Clear examples below show how school maths connects to buying a home.

1. Adding and Subtracting

Before looking at loans, families work out their total savings. Money saved by different people in the family is added together. For instance, mum has saved ยฃ10,000 and dad has saved ยฃ10,000.

Adding both amounts gives the full savings total: 10,000 + 10,000 = 20,000

Next, savings are compared with the house price. Subtraction helps show how much money still needs to be found. If a house costs ยฃ200,000 and ยฃ20,000 is already available, the remaining amount must be borrowed:

200,000 โ€“ 20,000 = 180,000

Numbers that matter most at this stage are:

  • ยฃ20,000 as total savings
  • ยฃ200,000 as the house price
  • ยฃ180,000 as the loan needed

2. Percentages

 

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Money borrowed from a bank to buy a house is called a mortgage. Banks charge interest for lending money, and interest is calculated using percentages. Percentage work links closely to fractions and decimals taught at school.

Using the same figures, families can calculate what portion of the house price is borrowed.

Dividing the loan by the house price and multiplying by 100 gives the result: ยฃ180,000 รท ยฃ200,000 ร— 100 = 90%

Interest costs are then worked out using multiplication.

If a bank sets an interest rate of 5%, the yearly interest payment can be calculated like this: ยฃ180,000 ร— 5% = ยฃ180,000 ร— 5/100 = ยฃ9,000 per year

Important details in this calculation include:

  • 90% of the house price being borrowed
  • 5% interest charged by the bank
  • ยฃ9,000 paid each year in interest

3. Dividing

Mortgage payments are usually spread out over months. Division helps turn a yearly cost into smaller, equal monthly payments.

Breaking large amounts into manageable pieces makes planning easier.

For example, if ยฃ9,000 needs to be paid over one year, dividing by 12 months shows the monthly cost: ยฃ9,000 รท 12 = ยฃ750 per month

A similar maths problem might say, โ€œYou have ยฃ9,000 and want to share it equally between 12 friends.โ€

Each friend receives the same amount, just as each month requires the same payment.

Math Can Help Us Solve Problems Every Day

Person using calculator as part of house-buying plans
Math is everyday around us, even in the smallest daily tasks

Big decisions like buying a house and small choices like sharing sweets with friends both rely on maths.

Everyday life constantly uses numbers to help people decide, plan, and check results.

Skills learned in the classroom appear again and again in adult situations, only with larger amounts involved.

Common daily situations where maths is used can be seen in areas such as:

  • counting and adding money to keep track of savings
  • working with percentages to estimate costs and interest
  • dividing amounts to plan regular monthly payments
  • organising information, such as arranging numbers in a list or table.

Adults often use tools like a CRM system to keep details about house prices, mortgage offers, and payments organised in one place.

Skills like these are practised through maths exercises, homework tasks, and quizzes.

Adults depend on the same abilities when handling money, paying bills, or planning future purchases.

A short challenge below shows how these ideas work together.

Mia wants to buy a small house that costs ยฃ100,000. Savings of ยฃ25,000 will be used first, so subtraction helps find the amount that must be borrowed.

100,000 โ€“ 25,000 = 75,000

Numbers involved in this step include:

  • ยฃ100,000 as the house price
  • ยฃ25,000 as savings
  • ยฃ75,000 as the mortgage needed

Interest is charged at a rate of 5% per year. Multiplication helps calculate the yearly interest, and division turns that amount into monthly payments.

  • ยฃ75,000 ร— 5% = ยฃ3,750 per year
  • ยฃ3,750 รท 12 = ยฃ312.50 per month

Important results here are

  • 5% as the interest rate
  • ยฃ312.50 paid each month in interest

Examples like this show how school maths connects directly to everyday decisions.

Bigger numbers may be used, but the thinking stays the same. Story problems in class prepare students for real situations that adults face every day.

Math Skills That Help With Big Decisions

Here are a few suitable examples of content that could be added to strengthen the article and keep it aligned with its educational tone.

Example #1: Using Time and Years in Maths

Buying a house also involves thinking about time, which is another maths skill learned at school.

Mortgages are often paid back over many years, not just months.

A typical mortgage might last:

  • 20 years
  • 25 years
  • 30 years

If someone pays ยฃ750 every month for 25 years, multiplication helps estimate the total amount paid over time.

Calculations like this help families see how long-term decisions affect their finances and show how time-based maths problems matter in real life.

Example #2: Comparing Options Using Maths

Families rarely look at just one house or one mortgage offer.

Comparing choices uses maths skills linked to tables, lists, and simple comparisons.

For example, two banks might offer:

  • a 4.5% interest rate with higher monthly payments
  • a 5% interest rate with lower starting payments

By comparing numbers side by side, families can decide which option suits them better.

Exercises that ask students to compare prices or find better deals use the same logic.

Example #3: Budgeting and Everyday Spending

Small house model, a stack of cash and house keys resting on a black calculator
Using math for budgeting is something we all do every month, week or day

House costs do not stop with the mortgage. Families also budget for bills, repairs, and daily expenses.

Monthly costs might include:

  • electricity and water bills
  • food shopping
  • transport costs

Adding these numbers helps families check how much money remains at the end of the month.

Problems that involve calculating change or total spending in school prepare students for this kind of planning.

Why This Matters

Maths isnโ€™t only something you learn for school. Itโ€™s something you use every day, even when you grow up.

When families plan big things like buying a house, they use the same maths skills youโ€™re learning now. They also use tools like a mortgage CRM system to help keep all the information and numbers organised.

So, the next time you solve a maths problem, remember that it will help you make real life decisions when you grow up. Keep practising, keep learning, and youโ€™ll find it very useful in your everyday life.

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Malcolm Osborn

I'm Malcolm Osborn, an experienced mathematics educator and curriculum developer with a strong passion for making math accessible and engaging. With over 15 years of experience in mathematics education, I have dedicated my career to developing innovative learning strategies that help students build confidence in their mathematical abilities. My work focuses on interactive learning methods, problem-solving techniques, and real-world applications of mathematics. I have contributed to numerous educational platforms, designing quizzes, exercises, and study guides that support both students and teachers. My mission is to bridge the gap between theoretical math and practical understanding, ensuring that every child has the opportunity to succeed. In addition to my work in mathematics education, I actively research and write about effective teaching methodologies, cognitive learning techniques, and the role of gamification in early math education. Through my articles and resources, I strive to provide parents and educators with valuable tools to nurture a love for mathematics in children. You can explore my latest insights, guides, and problem-solving strategies right here on this platform.