This unit aligns with CCSS 5. NBT.A.1, 5.NBT.A.2, and 5.NBT.A.3
Before we ask students to add, subtract, multiply, and divide decimals it is essential that we help them understand what decimals actually represent. You can use this unit to help you do this. Base ten blocks are a great way to help students see what decimals look like.
To use the base ten blocks we need students to understand that the flat base ten block is equal to 1 whole, the long equals 1/10, and the unit cube equals 1/100. You can also show them the block, which equals 10 wholes.
The following activities can be used in whole group instruction, small group instruction, or for student math centers.
• In the first activity, students are given a decimal and they have to model it with the base ten blocks. Students should create the number with base ten blocks of their own and then illustrate the base ten blocks in their graphic organizer.
• The second activity is the same; however they are given the decimal in word form instead of standard form.
• The third activity asks students to write the same amount as a decimal, an illustrated model of base ten blocks, fraction form, and word form.
• The fourth activity asks students to write the same amount as a decimal, an illustrated model of base ten blocks, fraction form, word form, and expanded form.
• The fifth activity asks students to compare decimals through a partner game by creating two decimals with playing cards and modeling the two amounts with base ten blocks.