Montana Math MT.5.NBT.7
The Standard
Add, subtract, multiply, and divide decimals to hundredths using concrete models or drawings. This standard should incorporate designs and cultural context relating to Montana Indigenous Peoples and local communities.
2026 Montana Mathematics Content Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students use hundred grids, counters, and drawings to add, subtract, multiply, and divide decimals to hundredths. They label tenths and hundredths and show regrouping or equal groups when needed.
What Mastery Looks Like
- Students can model all four operations and explain what each part of the model represents. They can regroup one tenth as ten hundredths and show why 0.48 divided by 4 is 0.12.
Common Misconceptions
- Students may read 0.4 as four hundredths or line up 0.4 and 0.35 by their last digits. They may divide 0.48 into four groups of 12 squares but write 12 instead of 0.12.
How to Assess It
- On an exit ticket, ask students to draw hundred-grid models for 0.40 minus 0.17 and 0.48 divided by 4. Have them label each answer and explain one regroup or equal group.
Lesson moves
Ways to Teach It
Show a beadwork photo shared by a Montana tribal museum, then use colored counters on blank hundred grids to model 0.24 plus 0.16.
Ask, “Why does a hundred grid show that 0.36 divided by 3 is 0.12?” Have students draw and explain three equal groups.
Play decimal model match with cards for 0.24 plus 0.16, 0.50 minus 0.18, 0.12 times 3, and 0.48 divided by 4.
Use a local community market flyer: draw hundred-grid models to total $0.75 and $0.45, then find change from $2.00.
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Printable MT.5.NBT.7 Worksheet
A ready-to-print activity worksheet aligned to MT.5.NBT.7, with an answer key for the teacher on its own page. No account needed.
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