Montana Math MT.2.MD.5
The Standard
Use addition and subtraction within 100 to solve problems in context involving lengths that are given in the same units. This standard should incorporate 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 solve word problems about lengths measured in the same unit. They decide whether to add or subtract, then write an answer with the unit.
What Mastery Looks Like
- A student adds a 37 m path and a 25 m path to get 62 m. If 37 m of a 62 m path has been walked, they subtract to find 25 m left and check by adding.
Common Misconceptions
- Students may add when the question asks how much farther remains. They may subtract each digit separately and say 63 minus 28 is 45, or leave the unit off their answer.
How to Assess It
- Exit ticket: A path is 63 m long. You have walked 28 m. How many meters remain? Write an equation and label your answer.
Lesson moves
Ways to Teach It
Lay out 28 cm and 17 cm pieces of yarn on a desk, then join them and find the total length.
Ask: On a fictional route near Salish Kootenai College in Pablo, 23 m of a 65 m path has been walked. How much remains? Why subtract?
Play a matching game with length story cards, equation cards, and answer cards, using totals within 100.
Draw a local park path with two sections labeled 34 m and 26 m. Have students find the full walking distance.
Free download
Printable MT.2.MD.5 Worksheet
A ready-to-print activity worksheet aligned to MT.2.MD.5, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetKeep exploring
Related Standards
- MT.K.OA.2
Solve addition and subtraction problems in context within 10. This standard should incorporate cultural context relating to Montana Indigenous Peoples and local...
- MT.1.OA.1
Use addition and subtraction within 20 to solve problems of all types. This standard should incorporate cultural context relating to Montana Indigenous Peoples ...
- MT.5.NF.6
Solve problems in context that involve multiplication of fractions and mixed numbers. This standard should incorporate cultural context relating to Montana Indi...
- MT.2.OA.1
Use addition and subtraction within 100 to solve one- and two-step problems in context involving all problem types. This standard should incorporate cultural co...
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.
Also for this standard:Make a WorksheetMake a QuizMake a Sub Lesson