Evaluating numerical correctness
The written form of -3 2/3 seems incorrect, and the calculations for \(5 1/3 - 8 3/3\) don’t match the original value. Actually, \(8 3/3\) is equal to 9, leading to -3.667. I might be misinterpreting the first numeral as a 6, which it resembles. Furthermore, for \(-2 \frac{?}{7} + 4 \frac{3}{5}\), I see potential mistakes too. The numerator after -2 looks like 2, which may need closer inspection.Calculating fractions
I'm working through the math, computing 5 4/12 - 6 3/12. First, I break it down: that's (5-6) + (4/12 - 3/12), which gives me -1 + 1/12. So, I end up with -11/12. If I look at the improper fractions, I see 64/12 - 75/12 equals -11/12 as well. It seems like I need to explain the principle behind these calculations more clearly.Calculating fractions carefully
I’m starting to simplify \(6 1/3\) to \(5 4/3\), which helps me clearly see the numbers. When I subtract 8 from it, I think about the steps: \(5 - 8 = -3\) plus \(4/3\) gives me \(-3 + 4/3\), which seems to equal \(-1 1/3\). I realize \(5.333 - 8\) is actually \(-2.667\). So I keep checking until I confirm everything: the math finally resolves to \(-2 2/3\) after carefully tracking each part.Correcting calculations
I’m identifying a mistake in my calculations. I initially thought -2 2/3 was right, but it should be -1 2/3. I mistook the decimals in my steps regarding 6 1/3 and -8. The original expression -8 corresponds with the proper simplifications, and the process needs to be clear. For example, explaining the borrowing from 6 helps clarify it. I also need to manage mixed numbers properly for the other calculations, tracking denominators and operations correctly.
Краткий ответ:
- \(6\frac13-8=-1\frac23\)
- \(-2\frac27+4\frac35=2\frac{11}{35}\)
- \(5\frac13-6\frac14=-\frac{11}{12}\)
Решение
1. Приведём к общему знаменателю:
\[ 6\frac13=\frac{19}{3},\qquad 8=\frac{24}{3} \]
\[ \frac{19}{3}-\frac{24}{3}=-\frac{5}{3}=-1\frac23 \]
В записи на фото ошибка: при займе \(6\frac13=5\frac43\), а не \(5\frac13\).
2.
Общий знаменатель для \(7\) и \(5\) — \(35\):
\[ -2\frac27+4\frac35 =-2\frac{10}{35}+4\frac{21}{35} \]
\[ 4\frac{21}{35}-2\frac{10}{35} =2\frac{11}{35} \]
3.
Общий знаменатель для \(3\) и \(4\) — \(12\):
\[ 5\frac13-6\frac14 =5\frac4{12}-6\frac3{12} \]
Переведём смешанные числа в неправильные дроби:
\[ \frac{64}{12}-\frac{75}{12} =-\frac{11}{12} \]
Проверка: \(5\frac13\) меньше, чем \(6\frac14\), поэтому результат действительно должен быть отрицательным.