3rd Grade Math (Montana Content Standards)

Operations and Algebraic Thinking (OA)

• MT.3.OA.1 Understand a product as a number of groups times the number in each group.
• MT.3.OA.2 Understand whole-number quotients as equal sharing or equal grouping.
• MT.3.OA.3 Solve problems in context by multiplying and dividing within 100.
• MT.3.OA.4 Find the missing whole number that makes a multiplication or division equation true.
• MT.3.OA.5 Use the commutative, associative and distributive properties to multiply.
• MT.3.OA.6 Use division as an unknown-factor problem.
• MT.3.OA.7 Multiply and divide within 100 flexibly, accurately and efficiently.
• MT.3.OA.8 Solve two-step problems in context and check reasonableness, including Montana cultural contexts.
• MT.3.OA.9 Find arithmetic patterns and explain them with properties of operations.

Number and Operations in Base Ten (NBT)

• MT.3.NBT.1 Round whole numbers to the closest ten or hundred.
• MT.3.NBT.2 Add and subtract within 1,000 using place value and properties.
• MT.3.NBT.3 Multiply one-digit numbers by multiples of 10 from 10 to 90.

Number and Operations – Fractions (NF)

• MT.3.NF.1 Understand unit fractions and fractions as parts of a whole split into equal parts.
• MT.3.NF.2 Show fractions as points on a number line.
• MT.3.NF.3 Understand equivalent fractions, compare fractions and justify the results.

Measurement and Data (MD)

• MT.3.MD.1 Tell and write time to the minute and solve time-interval problems.
• MT.3.MD.2 Measure and estimate liquid volume and mass in customary and metric units.
• MT.3.MD.3 Draw and interpret scaled picture and bar graphs, including Montana cultural contexts.
• MT.3.MD.4 Measure to the half or quarter inch and record the data on a line plot.
• MT.3.MD.5 Understand area as square units covering a flat figure with no gaps or overlaps.
• MT.3.MD.6 Measure area by counting unit squares.
• MT.3.MD.7 Link area to multiplication and addition, including Montana cultural contexts.
• MT.3.MD.8 Solve perimeter problems and compare rectangles with the same perimeter or area.

Geometry (G)

• MT.3.G.1 Recognize attributes shared across shape categories, including quadrilaterals.
• MT.3.G.2 Split shapes into equal-area parts and name each part as a unit fraction.