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Grade 5 · unit review

Review: Read, Scale, Compare, and Round Decimals

Extend place value through thousandths and explain powers-of-ten changes.

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Unit review questions
1. Write 6 ones, 4 tenths, 0 hundredths, and 7 thousandths as a decimal.
Need a hint?
  • Write a zero for an empty place between occupied places.
  • A digit in thousandths is ten times smaller than the same digit in hundredths.
2. Calculate 0.49 × 1000.
Need a hint?
  • For positive inputs, multiplying by a power of ten enlarges the value.
  • Check the scaling direction rather than memorizing an unexamined dot movement.
3. Which is greater: 6.301 or 6.299?
Need a hint?
  • Trailing zeros can align equal places.
  • Do not compare decimal strings by digit count.
4. Round 3.107 to hundredths using halfway-up ties.
Need a hint?
  • Read the requested precision before rounding.
  • Rounding an already rounded value can differ from rounding the original directly.

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Use the skills in a new task

Compare 2.075 and 2.08, then round 2.075 to hundredths and multiply it by 100.

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Compare with a model response

2.08=2.080, which is five thousandths greater than 2.075. Halfway-up rounding gives 2.08. Multiplication by 100 gives 207.5 because every represented digit value becomes one hundred times larger.

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