A comprehensive introduction to decimals and decimal place value. These activities use the Base 10 Block 100 Square as the One, the 10 Rod as .1, and the 1 cube as .01.
The “Thousand Cube,” therefore, is now 10. Numbers range from 2-digit decimal numbers (e.g., 54.75) to hundredths (e.g., .06).
Decimal place value is just a continuation of the pattern (already familiar to 4th and 5th graders) in whole number place value. These activities make this explicit, with images of the Base 10 Blocks related to numbers written in decimal format, as fractions, and in words. The grouping of hundredths into tenths, and tenths into ones, is shown. Students initially write decimals in a place value chart.
There is plenty of practice in expressing numbers four ways: as decimals, fractions, in words, and as shaded regions of Base 10 Block 100 grids, with decimals less than 1 as well as decimal mixed numbers.
Most pages end with a finely-scaled number line for students to locate each number on that page in order, so they keep perspective on the sequence and magnitude of these numbers.
Common Core Standards:
4.NF.7: “Use decimal notation for fractions with denominators of 10 or 100.”
Level: Grades 4 – 5
Length/Duration: 22 pages of student work, 3-5 days
Smart Notebook 10 file is also available as a separate free download. Search under "Intro to Decimal Place Value."