Unit 3: Addition & Subtraction
Mini-Unit 3: Adding & Subtracting Decimals to 1 Million
Lesson 3.2: Adding Whole Numbers & Decimals
This teacher-led small-group activity includes a printable math mat (with place-value supports and modeling space) and 24 editable task cards for hands-on practice with money amounts and decimals.
Students will:
• build decimal and money amounts using place-value supports
• add whole numbers and decimals, aligning digits correctly
• regroup when needed using money models and place-value reasoning
• explain their thinking using decimal vocabulary and mixed-denomination amounts
• justify how decimal place value impacts sums with and without decimals
Standards:
CCSS: 5.NBT.7 (partial)
TEKS: 4.2E, 4.4A
