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Montana - Mathematics: Core Plus Number and Quantity
2026 Content Standards | Adopted: 2025
MT.PLUS.NUM.REAS: Numeric Reasoning
MT.PLUS.NUM.REAS.2: Understand there is a complex number 𝑖 such that 𝑖² = –1, and every complex number has the form 𝑎 + 𝑏𝑖 with 𝑎 and 𝑏 as real numbers by:
MT.PLUS.NUM.REAS.2.a: Adding, subtracting, multiplying, and dividing complex numbers, and
Points in the Complex Plane
Identify the imaginary and real coordinates of a point in the complex plane. Drag the point in the plane and investigate how the coordinates change in response. 5 Minute Preview
Roots of a Quadratic
Find the root of a quadratic using its graph or the quadratic formula. Explore the graph of the roots and the point of symmetry in the complex plane. Compare the axis of symmetry and graph of the quadratic in the real plane. 5 Minute Preview
MT.PLUS.NUM.REAS.2.b: Finding the conjugate of a complex number.
Points in the Complex Plane
Identify the imaginary and real coordinates of a point in the complex plane. Drag the point in the plane and investigate how the coordinates change in response. 5 Minute Preview
Roots of a Quadratic
Find the root of a quadratic using its graph or the quadratic formula. Explore the graph of the roots and the point of symmetry in the complex plane. Compare the axis of symmetry and graph of the quadratic in the real plane. 5 Minute Preview
Correlation last revised: 7/28/2026
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