Tenths and Hundredths: Decimal Place Value
A complete Grade 4 math lesson pack on decimal place value: tenths and hundredths, writing...
View Resource : Tenths and Hundredths: Decimal Place ValueA complete Grade 4 math pack on finding fractions of amounts with a festive theme: unit fractions (1/4 of 24 cookies) by dividing by the denominator, non-unit fractions (3/4 of 24) by dividing then multiplying, using bar models, solving Christmas word problems and checking answers. Includes slides with worked examples, a lesson plan, worksheet, quiz, homework, flashcards, a rubric and answer keys.
Students learn how to find a fraction of a number of objects, such as cookies, presents or candy canes. For a unit fraction, they divide by the denominator: 1/4 of 24 means 24 ÷ 4 = 6. For a non-unit fraction, they find one part and then multiply by the numerator: 3/4 of 24 is 3 × 6 = 18. Bar models help them see the equal parts. They solve festive word problems, such as how many cookies are left after a family eats some, and check answers by making sure all the parts add up to the whole.
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Support: use counters and focus on unit fractions with amounts up to 24. Challenge: students solve two-step problems, such as finding what is left after 2/5 of 30 presents are opened.
Use the worksheet and quiz to check finding fractions of amounts. Use the rubric to assess the homework problems and explanations.
Encourage students to say the method aloud: divide by the bottom number, multiply by the top number. A quick check is that a fraction less than one whole must give an answer smaller than the starting amount.
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