Peter's calculation
Peter wrote the following: 7 1/4 - 3 3/4 = 4 2/4 = 4 1/2 . Is Peter’s calculation correct? Using words (math vocabulary) and numbers explain why he is correct or incorrect.
Result
Result

Showing 2 comments:
Dr Math
Can't be subtracted whole parts and fractions part in opposite direction.
7 1/4 - 3 3/4 = whole (7-3) and fraction part (3-1)/4 = 4 and fraction part 2/4 = 4 1/2
7 1/4 - 3 3/4 = whole (7-3) and fraction part (3-1)/4 = 4 and fraction part 2/4 = 4 1/2
Tips for related online calculators
Need help calculating sum, simplifying, or multiplying fractions? Try our fraction calculator.
Need help with mixed numbers? Try our mixed-number calculator.
Need help with mixed numbers? Try our mixed-number calculator.
You need to know the following knowledge to solve this word math problem:
Related math problems and questions:
- Math test
Brayden was solving some math problems for the math team. He answered 2 math problems. Matthew answered 3, John answered 1 reasoning. Matthew 1/2 times as many. Brayden said that 2/6. Is he correct? Why or why not? Be sure to explain your answer.
- Randy
Randy solved the following problem: 7/8 + 9/16. He said: I can add 7 and 9 to get 16 and add 8 and 15 to get 23. The answer is 16/23. Is randy correct? Explain.
- Humans
Humans exploring space have left behind bags of trash, bolts, gloves, and pieces of satellites. Let's say there are currently about 5,000,000 pounds of litter in orbit around Earth. Jenny says that this amount using number names is five billion. Is J
- Identity
123456789 = 100 Correct the given identity/equation only using three plus or minus signs.
- Truncated cone
Calculate the height of the rotating truncated cone with volume V = 1354 cm³ and a base radii r1 = 9.1 cm and r2 = 5.4 cm.
- Multiplication negatives
Josh says that (4)(-7)(-1) is equal to (4)(7). Evangelina says (4)(-7)(-1) is equal to (-28)(-1) . Who is correct? Explain your reasoning.
- Math test
Obelix filled a mathematical test in which he answered 25 questions. For every correct answer, he received 5 points, for each bad answer he had 3 points deducted. Obelix gained 36% of all points in the test. How many questions did he solve correctly?
- Rajendra
Rajendra a farmer had two sons and two daughters. He decided to divide his property among his sons and daughters. So he wrote a "WILL" about distribution of his property. According to his "WILL", he desired to give 3/5 th of the property to his sons in eq
- Sum or difference
Illustrate the sum or difference of the following expressions 1. 4/8+1/2= 2. 5/6-1/4= 3. 4-3/6= 4. 3/4+1/3= 5. 9/10-2/5=
- Fraction + eq
Solve following simple equation with fractions: -5/6(8+5b) = 75 + 5/3b
- Multiplicative inverse
Explain why the reciprocal of - 1 1/17 is the multiplicative inverse of - 17/18.
- Brooke
Brooke divided 2/3 by 1/6 and got 1/9. Her classmate told her that she isn’t correct. What do you think went wrong with Brooke’s solution? Explain your answer in 2 - 3 sentences.
- Linear combination of complex
If z1=5+3i and z2=4-2i, write the following in the form a+bi a) 4z1+6z2 b) z1*z2
- Parenthesis 7284
Tomas received nine cards with the following numbers and math symbols math olympiad results. 18, 19, 20, 20, +, -, x, (,) Note 4 numbers and operators plus, minus, times, left parenthesis, right parenthesis. He stored the cards so that there were never tw
- Simple equation 5
Solve equation with fractions: X × 3/8 = 1/2
- Illustrate
Illustrate the following expressions then solve. 1. 3-8/10= 2. 4-2/5= 3. 2-3/8= 4. 3-3/7= 5. 5-4/9=
- Peter's 60371
How old is Peter's brother now, if he has 4 times as many in 15 years as he did 15 years ago?