# Find error in calculation

Sally's calculations are as follows 39-9×4+12

=30×16

=480

What are the errors in this calculation?

=30×16

=480

What are the errors in this calculation?

### Correct answer:

**Showing 1 comment:**

**Dr Math**

See our decimal calculator:

https://www.hackmath.net/en/calculator/decimal?input=39-9%C3%974%2B12

Sally has an error; she firstly subtracted and added and then multiplied operands. The math problem is about the order of operations without brackets. Multiply first, then add and subtract.

https://www.hackmath.net/en/calculator/decimal?input=39-9%C3%974%2B12

Sally has an error; she firstly subtracted and added and then multiplied operands. The math problem is about the order of operations without brackets. Multiply first, then add and subtract.

#### You need to know the following knowledge to solve this word math problem:

#### Grade of the word problem:

## Related math problems and questions:

- Manufacturing company

A random sample of 8 manufacturing companies is selected from a population of manufacturing companies. The market values (in millions of rands) of these eight manufacturing companies are: 17 65 117 206 172 181 221 94 What is the lowest and highest market - GP - sequence

The first three terms of a geometric sequence are as follows 10, 30, 90. Find the next two terms of this sequence. - Test scores

Jo's test scores on the first four 100-point exams are as follows: 96,90,76, and 88. If all exams are worth the same percentage, what is the minimum test score necessary on his last exam to earn an A grade in the class (90% or better)? - Calculate 3016

Calculate the height of the cylinder if you know its surface S and the radius of the base r. a) r = 2 cm, S = 120 cm square b) r = 7 dm, S = 4,000 dm square c) r = 0.2 m, S = 20 square meters - Salami

We have six kinds of salami that have ten pieces and one kind of salami that has four pieces. How many ways can we distinctly choose five pieces of salami? - The height 4

The height and radius of a cylinder are 25 ft and 5 ft, respectively. What is the surface area? - Bivariate data set

Here is a bivariate data set in which you believe y to be the response variable. x y 51.4 44.8 60.2 46.6 60.1 46.8 45.8 46.3 37.4 41.8 72.4 52.5 60 48.2 67.5 49.5 60.9 49.8 51.1 45.7 62.7 49.6 194.9 84.2 Make a scatter plot of this data. Which point is an - Fraction + eq

Solve following simple equation with fractions: -5/6(8+5b) = 75 + 5/3b - Introduced 81104

The * (asterisk) operation assigning one number to two pairs of numbers is introduced as follows: (a, b)*(c, d) = ac+bd We know that: (x,2)*(-1, v) = -1 and (2,-1)*(u, v)=5 and (u, v)*(1,1)=-2 What is (1,2)*(x, y) equal to if y=3? - Sum of mixed

The sum of two mixed numbers is 15½. One of the numbers is 5 ¾. What is the other? - 45 percentile

Given the following data 11 15 24 33 10 35 23 25 40 What is P45? - Multiple numerical bases

Find the value of x for which 312_{four}+52_{x}=96_{ten}. Hint: four, x, and ten are the base of the given number. - School group

There are five girls and seven boys in the group. They sit in a row next to each other. How many options if no two girls sit next to each other? - Martina

Martina is solving the equation 4x - 11 = 2x + 391. Here are the first steps of her solution. 4x - 11 = 2x + 391 2x - 11 = 391 2x = 402 What did Martina do to get 2x - 11 = 391? - Tess bought

Tess bought six dressed chickens. Their weights are tagged as follows: 1.4 kg, 1.9 kg, 2.05 kg, 0.94 kg, 1.1 kg and 1.45 kg. What is the total weight of the six chickens - Chickens and rabbits

In the yard were chickens and rabbits. Together they had 23 heads and 76 legs. How many chickens and how many rabbits were in the yard? - Evaluate 33

Evaluate x+y when x=- 4/5 and y= 1/3. Write your answer as a fraction or mixed number in simplest form.