Question 10
✓ Correct- Answer
- −333, −23, −3.2, 0.32, 3.02
Why
The values are correctly ordered from smallest to largest.
Worked solution
- Order the numbers from least to greatest.
−333 < −23 < −3.2 < 0.32 < 3.02
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1In Class
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- Bennett, Clara
- Harrison, Anna
- Lu, Jason
- Kennedy, Charles
- Smith, Emily
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Matdo Grade Early access
For parents, tutors and teachers. Math, science, reading and essays. You review every mark.
✓ 5✗ 2Detailed · 12 s
Grading Details
Question 11
✓ Correct- Answer
- 28.4
Why
The sum of −8.4 and 36.8 is correctly calculated as 28.4.
Worked solution
- Add the positive and negative decimals.
−8.4 + 36.8 = 36.8 − 8.4 = 28.4
Question 12
✗ Incorrect- Student's answer
- −6.15
- Correct answer
- −6.42
Possible mistake
At step 1: The student added 3 and 12 improperly to get 15 instead of aligning decimal places (0.30 + 0.12 = 0.42).
Why
The student misaligned the decimal places when adding 0.3 and 0.12, arriving at −6.15 instead of −6.42.
Worked solution
- Add the two negative decimals.
−6.3 + (−0.12) = −(6.30 + 0.12) = −6.42
Question 13
✓ Correct- Answer
- 0
Why
The sum of opposites is zero.
Worked solution
- Add opposite numbers.
13.2 + (−13.2) = 0
Question 14
✓ Correct- Answer
- 37.7
Why
The two decimals are correctly added together to get 37.7.
Worked solution
- Add the two positive decimals.
14.6 + 23.1 = 37.7
Question 15
✓ Correct- Answer
- −11.5
Why
Adding zero leaves the value unchanged at −11.5.
Worked solution
- Add negative 11.5 to zero.
0 + (−11.5) = −11.5
Question 16
✗ Incorrect- Student's answer
- −15.06
- Correct answer
- −16.15
Possible mistakes
At step 1: The student added 16.1 and 0.94 incorrectly as 16.95 instead of 17.04.
At step 2: The student made an arithmetic error when evaluating 0.89 − 16.95.
Why
The student incorrectly calculated −16.1 − 0.94 as −16.95 rather than −17.04.
Worked solution
- Combine the negative terms first.
−16.1 − 0.94 = −17.04 - Subtract from 0.89.
0.89 − 17.04 = −16.15
Essay Mode9 fixes · 8 s
Essay Feedback
Teacher-style feedback
Leo wrote an engaging, complete personal narrative that captures the excitement of his first sleepover with plenty of relatable details. His sequencing is clear and easy to follow from the initial arrival to the morning pancakes. Working on sentence punctuation and possessive apostrophes will help polish his storytelling even further.
Rubric
- ClericalPartly met
Leo provides his name and indents his paragraphs, but leaves the date blank and does not include a title.
- GrammaticalPartly met
Leo struggles with possessive apostrophes, capitalization at sentence starts, run-on sentences, and subject-verb agreement.
- CompositionMet
Leo tells a clear, chronological narrative with a defined beginning, middle, and end that fulfills the prompt well.
Paragraph 1
StrongLeo establishes the topic right away and describes what he packed to set the scene effectively. Combining the last couple of clauses into two shorter sentences would help the rhythm flow even better.
Paragraph 2
StrongLeo builds strong momentum by listing fun sleepover activities and including lively details like Gabe being scared of the movie. Replacing repetitive sentence starters such as ‘and then’ would make the narrative flow more smoothly.
Paragraph 3
StrongLeo wraps up the experience neatly by mentioning the morning breakfast and sharing how much he enjoyed the night. Adding a detail about what kind of pancakes or conversation they had at breakfast would give the ending even more flavor.
Spelling and grammar
9 fixes- Misspelling and missing possessive apostrophe
Freind Gabes→ friend Gabe’s - Misspellings
exited becuase→ excited because - Missing possessive apostrophe
elses→ else’s - Misspelling and unnecessary capitalization
Flashlite→ flashlight - Missing capital letter to start a sentence
popcorn. we→ popcorn. We - Run-on sentence
movie it→ movie; it - Missing capital letter and subject-verb agreement error
then we was supposed→ Then we were supposed - Missing possessive apostrophe
Gabes dad→ Gabe’s dad - Spelling error
alot→ a lot
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