HSN.CN.A.1 math practice. Learn by doing.

HSN.CN.A.1 practice covers know there is a complex number i such that i² = −1, and every complex number has the form a + bi with a and b real. Work through 8 free questions with answers and explanations, then continue in the related math games.

Grade 111 mapped skills

What it covers

Skills aligned to HSN.CN.A.1

Complex number operations

Grade 1117 questions

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8 free questions · 0/0 correct

Practice playeasy

What is $|6 + 8i|$ ?

$|6 + 8i| = \sqrt{6^2 + 8^2} = \sqrt{100} = 10$ .

Practice playeasy

What is $(3i)^{2}$ ?

$(3i)^{2} = 9i^{2} = 9(-1) = -9$ .

Practice playeasy

What is $i^{3}$ ?

$i^{3} = i^{2} \cdot i = (-1)(i) = -i$ .

Practice playeasy

What is $|5 + 12i|$ ?

$|5 + 12i| = \sqrt{5^2 + 12^2} = \sqrt{169} = 13$ .

Practice playeasy

What is $(2i)^2$ ?

$(2i)^2 = 4i^2 = 4(-1) = -4$ .

Practice playeasy

What is $i^{6}$ ?

$i^{6} = (i^{2})^{3} = (-1)^{3} = -1$ .

Practice playeasy

What is $|8 + 15i|$ ?

$|8 + 15i| = \sqrt{8^2 + 15^2} = \sqrt{289} = 17$ .

Practice playeasy

What is $(4i)^2$ ?

$(4i)^2 = 16i^2 = 16(-1) = -16$ .

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Tests that assess these skills:

ACT MCAP NY State Math PARCC

Test reporting domains

ACT All grades: Preparing for Higher Math ATLAS Algebra I: Number and Quantity ATLAS Algebra II: Number and Quantity DC CAPE Algebra II: Complex Numbers and Quadratic Equations Georgia Milestones Algebra II: The Complex Number System ISASP High School: Number and Quantity

Nearby standards

HSG.SRT.D.10 HSN.CN.A.2 All Common Core standards