Montana Math MT.4.NBT.5
The Standard
Multiply a whole number of up to four digits by a one-digit whole number, multiply two two-digit numbers, flexibly using strategies based on place value and the properties of operations, and illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
2026 Montana Mathematics Content Standards
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students break numbers into place-value parts and multiply each part. They add the partial products and show their work with an equation, array, or area model.
What Mastery Looks Like
- A student can solve 1,234 × 4 and 23 × 14 by breaking the numbers apart. They label each partial product in an area model and write an equation that gives the same total.
Common Misconceptions
- Students may treat the 2 in 23 as 2 instead of 20. They may leave out 20 × 10 or add the partial products incorrectly.
How to Assess It
- Give a two-part exit ticket: Solve 1,234 × 4 and 23 × 14. For each, draw a labeled area model and write a matching equation.
Lesson moves
Ways to Teach It
Give pairs base-ten blocks to build 12 × 13 in four sections, then label and add each section's product.
Write 1,234 × 4 on the board and ask: Which partial product is easiest to miss, and how would you check it?
Give pairs cards for 23 × 14 and 32 × 16, their partial products, and matching area models; race to sort and check each set.
Post a $13 notebook price tag and an order for 24 notebooks; students use an area model to find the total cost.
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Printable MT.4.NBT.5 Worksheet
A ready-to-print activity worksheet aligned to MT.4.NBT.5, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- MT.2.NBT.6
Add up to four two-digit numbers using multiple strategies.
- MT.4.NBT.6
Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, flexibly using strategies based on place value, the propertie...
- MT.5.NBT.6
Flexibly, accurately, and efficiently find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors using strategies based...
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