MYTUTOR SUBJECT ANSWERS

153 views

How do I multiply decimal numbers?

Start by multiplying the two numbers as though they didn't have a decimal point (e.g. 2.7*3.6 becomes 27*36 = 972). Now add up how many decimal places were in the original two numbers (e.g. 2.7 and 3.6 have 2 decimal places, 3.45 and 9.2 have 3 decimal places) and give your answer that number of decimal places (e.g. since 2.7 and 3.6 have 2 decimal places, 2.7*3.6 will have 2 decimal places. Calculate 27*36 = 972, then give it 2 decimal places to get 2.7*3.6 = 9.72).

Remember that, in this situation, zeroes should be counted as decimal places. For example: 1.02*4.05. Calculate 102*405 = 41,310. Now notice that 1.02 and 4.05 have 4 decimal places. Therefore, give 41,310 4 decimal places to find that 1.02*4.05 = 4.1310.

Step by step this is layed out as:

1) Multiply without decimal points.

2) Count the number of decimal places in the 2 numbers you're multiplying.

3) Give your answer to part (1) the number of decimal places from part (2).

Seb G. 11 Plus Maths tutor, 13 plus  Maths tutor, A Level Maths tutor...

4 months ago

Answered by Seb, a 11 Plus Maths tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

131 SUBJECT SPECIALISTS

£18 /hr

Emily S.

Degree: Modern Languages and Cultures (Bachelors) - Durham University

Subjects offered: Maths, Italian+ 4 more

Maths
Italian
French
English Literature
Biology
.MLAT (Modern Languages)

“I am a first year student at Durham University studying Modern Languages and Cultures, more specifically French and Beginner’s Italian. I am so passionate about learning languages and I strongly believe that a knowledge of another lan...”

MyTutor guarantee

£18 /hr

Bethany F.

Degree: Chinese Studies with Spanish (Bachelors) - Durham University

Subjects offered: Maths, Spanish+ 1 more

Maths
Spanish
Mandarin

“About me: Hi! My name is Beth and I'm a final year Chinese and Spanish student at Durham University. I am so passionate about foreign languages and cultures and I would absoutely love to share my knowledge and passion with you. I have...”

MyTutor guarantee

£18 /hr

Reece F.

Degree: History (Bachelors) - York University

Subjects offered: Maths, History+ 4 more

Maths
History
French
English Literature
English Language

“Hi there! I'm a third year history student at the University of York and I'm applying to do a masters in Medieval History at Cambridge next year. I specialise in History, English and French and I would love to help with any difficulti...”

MyTutor guarantee

About the author

Seb G.

Currently unavailable: for regular students

Degree: Mathematics (Masters) - Bath University

Subjects offered: Maths

Maths

“Me: I'm a second year maths student at the University of Bath. I fell in love with maths after a rocky start with the subject, so believe that I can help people regardless of whether they like maths or not.  I've been tutoring maths l...”

MyTutor guarantee

You may also like...

Posts by Seb

How do I differentiate implicitly?

How do I evaluate composite functions?

How do I find the prime factors of a number?

How do I multiply decimal numbers?

Other 11 Plus Maths questions

How many thirds are there in 12?

A group of 120 Year 4s and Year 5s are going on a school trip. 60% of the children going on the trip are Year 4s, and of the Years 4s, 1/4 are boys. How many Year 4 girls are going on the trip?

How do I multiply decimal numbers?

The average temperature in May is 18 ºC. The average temperature in November is a third of the average temperature in May. The average temperature in September is twice the average temperature in November. What is the average temperature in September?

View 11 Plus Maths tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok