Calculating expressions and fractions
I’m working through some math equations. Starting with \( (2 \frac{1}{8} - 3.5) \), I simplify that to yield \( -\frac{11}{8} \), which leads to some more divisions and additions. Nice, I verified my decimals! Then, I move on to line #4, where I see something funky with the fractions and negatives. It’s like, why choose 29 as a divisor? I think I need to check the digits again and zoom in on those visual fractions.Analyzing fractions and signs
I'm considering whether the mixed number starts at \(4 \frac{2}{3}\). If I do the math, I end up with \( -\frac{88}{15} \), but then I multiply by \( -\frac{5}{29} \), which makes it \( \frac{88}{87} \). It’s getting messy, especially when working with \( -3.6 \). I wonder if I misinterpreted signs. Should there be a plus sign instead? I need to double-check and zoom in on the line 4 parenthetical to confirm that denominator is \(29\).Calculating mixed numbers
I'm considering mixed numbers like -2 1/3 and 0.5, with a divisor of -11/6. When I perform the calculations, I find a result of 25/11. Then, looking at -1 2/3, I get 20/33. It’s interesting that while the second result isn’t as neat, it’s still a valid possibility. I wonder how these values might work in relation to the overall context of what I'm checking.Evaluating an arithmetic expression
I'm analyzing the visual input of a math expression, specifically line 4, which reads: (− 4 2/5 − 1,2) · (− 5/29) − 3,6. I'm focusing on the denominator, which appears to be 29, possibly indicated by the 9 with a descender. I wonder why the exercise features 29. If I combine the numbers, I get a complicated outcome, making me question the simplicity of the exercise. There seem to be various answers, often in fractions.Analyzing arithmetic operations
I'm looking at arithmetic exercises and noticing patterns. For instance, question #4 stands out because the factors simplify nicely, while #7 also seems reciprocal. Questions #5 and #3 allow for exact cancellation, which is interesting. Question #2 may not cancel but still has a neat outcome. It feels like these exercises are designed for manageable answers. Hmm, maybe the inner sums are chosen to simplify the division, even if I misread some parts. It looks like all expressions include two operations, likely to keep answers straightforward.Evaluating fractions and calculation
I'm inspecting an equation where a plus sign is followed by a fraction, likely either 3/4 or 2/3. If it's +3/4, I can calculate -6/5 + 3/4, which simplifies to -9/20. Dividing -9 by 10 gives me 1/2. I notice -4.8 is close to -4.3, leading to -4 3/10. This feels neatly simple. Aha! I think the image's fraction after the plus is probably 3/4, not 2/3. Let's confirm!Evaluating visual fraction representation
I'm determining the visual representation of a fraction from an image. It seems the first line might show a numerator that looks like a curved 3 and a denominator resembling a 4 — potentially meaning it's 3/4. I'm magnifying the original display to inspect it further. I see the original line shows (- 1 1/5 + ?/?) : (- 9/10) - 4,8 and my guess is that the glyph represents 3/4. I should double-check this.Reassessing fraction calculations
I'm analyzing fractions from an image. The mixed number looks like 1 1/5, and the denominator appears to be 5. After the plus, I think I see a top value of 3 and a bottom value of 4, making it possibly 3/4. The divisor seems to be 9/10, and the calculation could match up with -4.3. I'm also recalibrating some earlier calculations because it turns out I miscalculated; for instance, -2 1/3 should equal -11/6 after adding 0.5. I'll double-check everything!Clarifying calculations
I need to outline the answers for each calculation clearly:
- -4.3
- 15/16
- 0.65
- -2.6
- 3.75
- -2/3
- -1.5
I must apply principles like converting mixed numbers or decimals to fractions and calculating parentheses first. For division, I'll multiply by the reciprocal. It's essential to maintain the order of operations, where multiplication and division come before addition and subtraction. I'll ensure to show the key steps concisely but clearly.
Краткий ответ
- \(-4,3\)
- \(\dfrac{15}{16}\)
- \(0,65\)
- \(-2,6\)
- \(3,75\)
- \(-\dfrac{2}{3}\)
- \(-1,5\)
Решение
При делении на дробь умножаем на обратную дробь. Десятичные дроби переводим в обычные.
\[ \left(-1\frac15+\frac34\right):\left(-\frac9{10}\right)-4,8 \] \[ \left(-\frac65+\frac34\right)\cdot\left(-\frac{10}{9}\right)-4,8 = -\frac9{20}\cdot\left(-\frac{10}{9}\right)-4,8 \] \[ =\frac12-4,8=-4,3. \]
\[ \left(-3\frac14+\frac25\right):\left(-\frac43\right)-1,2 \] \[ \left(-\frac{13}{4}+\frac25\right)\cdot\left(-\frac34\right)-\frac65 \] \[ =-\frac{57}{20}\cdot\left(-\frac34\right)-\frac65 =\frac{171}{80}-\frac{96}{80} =\frac{75}{80}=\frac{15}{16}. \]
\[ \left(2\frac18-3,5\right):\left(-\frac{11}{4}\right)+0,15 \] \[ \left(\frac{17}{8}-\frac72\right)\cdot\left(-\frac4{11}\right)+\frac3{20} \] \[ =-\frac{11}{8}\cdot\left(-\frac4{11}\right)+\frac3{20} =\frac12+\frac3{20} =\frac{13}{20}=0,65. \]
\[ \left(-4\frac25-1,2\right)\cdot\left(-\frac5{28}\right)-3,6 \] \[ \left(-\frac{22}{5}-\frac65\right)\cdot\left(-\frac5{28}\right)-\frac{18}{5} \] \[ =-\frac{28}{5}\cdot\left(-\frac5{28}\right)-\frac{18}{5} =1-\frac{18}{5} =-\frac{13}{5}=-2,6. \]
\[ \left(\frac7{20}-1\frac12\right):2,3+4,25 \] \[ \left(\frac7{20}-\frac32\right):\frac{23}{10}+\frac{17}{4} \] \[ =-\frac{23}{20}\cdot\frac{10}{23}+\frac{17}{4} =-\frac12+\frac{17}{4} =\frac{15}{4}=3,75. \]
\[ \left(-2\frac13+0,5\right):\left(-\frac{11}{6}\right)-1\frac23 \] \[ \left(-\frac73+\frac12\right)\cdot\left(-\frac6{11}\right)-\frac53 \] \[ =-\frac{11}{6}\cdot\left(-\frac6{11}\right)-\frac53 =1-\frac53=-\frac23. \]
\[ \left(-1\frac56-0,25\right)\cdot\left(-\frac{12}{25}\right)-2\frac12 \] \[ \left(-\frac{11}{6}-\frac14\right)\cdot\left(-\frac{12}{25}\right)-\frac52 \] \[ =-\frac{25}{12}\cdot\left(-\frac{12}{25}\right)-\frac52 =1-\frac52=-\frac32=-1,5. \]
Проверка: в заданиях 1, 3, 4, 5 и 7 после действий в скобках получаются дроби, которые удобно сокращаются с делителем или множителем.