This Grade 3 easy worksheet introduces mass using grams and kilograms under CCSS 3.MD.2. Students fix incorrect statements, complete fill-in problems about paperclips, textbooks, and dogs, and answer true or false questions. They learn that 1 kilogram equals 1000 grams and practice choosing grams for small objects and kilograms for heavier items, building early confidence with mass vocabulary and unit symbols g and kg.
Style:
Mass and Volume
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
An apple has a mass of about 100 kilograms.
Rewrite: An apple has a mass of about 100 grams.
2. Fix the sentence:
A Grade 3 textbook weighs about 1 gram.
Rewrite: A Grade 3 textbook weighs about 1 kilogram.
3. Fix the sentence:
A Grade 3 student's dog has a mass of 10 grams.
Rewrite: A Grade 3 student's dog has a mass of 10 kilograms.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. One paperclip has a mass of about 1 gram in Grade 3 science.
2. A bag of flour at the store has a mass of about 2 kilograms for Grade 3.
3. The unit gram is written with the short symbol g in Grade 3.
4. The unit kilogram is written with the short symbol kg in Grade 3.
Part C: True or False?
Read each statement. Circle True or False.
1. A Grade 3 toothbrush has a mass of about 20 grams.
True False
2. A Grade 3 backpack full of books has a mass of 5 grams.
True False
3. In Grade 3, 1 kilogram equals 1000 grams.
True False
Mass and Volume
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
An apple has a mass of about 100 kilograms.
Rewrite: An apple has a mass of about 100 grams.
2) Fix the sentence:
A Grade 3 textbook weighs about 1 gram.
Rewrite: A Grade 3 textbook weighs about 1 kilogram.
3) Fix the sentence:
A Grade 3 student's dog has a mass of 10 grams.
Rewrite: A Grade 3 student's dog has a mass of 10 kilograms.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) One paperclip has a mass of about 1 gram in Grade 3 science.
2) A bag of flour at the store has a mass of about 2 kilograms for Grade 3.
3) The unit gram is written with the short symbol g in Grade 3.
4) The unit kilogram is written with the short symbol kg in Grade 3.
★ Part C: True or False?
Read each statement. Circle True or False.
1) A Grade 3 toothbrush has a mass of about 20 grams.
True
False
2) A Grade 3 backpack full of books has a mass of 5 grams.
True
False
3) In Grade 3, 1 kilogram equals 1000 grams.
True
False
Ready to Practice?
Complete each section carefully.
10 Questions
15-20 minutes
Auto-graded
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