Add with Two Scalars (Level 1)

This math topic focuses on operations with matrices, emphasizing the addition of two matrices after each has been multiplied by a scalar. It provides practice on calculating the resultant matrix from such operations, with various problems structured to apply specific integer scalar values to two matrices and summing the results. Additionally, it includes multiple-choice answers, allowing for practice in selecting the correct resultant matrix from a list of possibilities while reinforcing understanding of matrix addition and scalar multiplication.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Matrices - Add with Two Scalars Worksheet

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Math worksheet on 'Matrices - Add with Two Scalars (Level 1)'. Part of a broader unit on 'Matrices' Learn online: app.mobius.academy/math/units/matrices/
1
Find the resulting matrix for dR + zB when d = 2 and z = 4
A LaTex expression showing R = \left[ {\begin{array} {cc} 3 & 7 \\ 2 & 2 \end{array} } \right]\\B = \left[ {\begin{array} {cc} 6 & 2 \\ 8 & 8 \end{array} } \right]
a A LaTex expression showing \left[ {\begin{array} {cc} 5 & 7 \\ 8 & 6 \end{array} } \right]
b A LaTex expression showing \left[ {\begin{array} {cc} 30 & 22 \\ 36 & 36 \end{array} } \right]
c A LaTex expression showing \left[ {\begin{array} {cc} 8 & 9 \\ 3 & 9 \end{array} } \right]
d A LaTex expression showing \left[ {\begin{array} {cc} 32 & 23 \\ 36 & 36 \end{array} } \right]
e A LaTex expression showing \left[ {\begin{array} {cc} 6 & 14 & 24 & 8 \\ 4 & 4 & 32 & 32 \end{array} } \right]
2
Find the resulting matrix for nX + cY when n = 3 and c = 4
A LaTex expression showing X = \left[ {\begin{array} {cc} 3 \\ 9 \end{array} } \right] \;\; Y = \left[ {\begin{array} {cc} 9 \\ 8 \end{array} } \right]
a A LaTex expression showing \left[ {\begin{array} {cc} 3 & 3 \\ 4 & 4 \end{array} } \right]
b A LaTex expression showing \left[ {\begin{array} {cc} 47 \\ 59 \end{array} } \right]
c A LaTex expression showing \left[ {\begin{array} {cccc} 9 \\ 27 \\ 36 \\ 32 \end{array} } \right]
d A LaTex expression showing \left[ {\begin{array} {cc} 45 \\ 59 \end{array} } \right]
e A LaTex expression showing \left[ {\begin{array} {cc} 45 \\ 62 \end{array} } \right]
3
A LaTex expression showing Z = \left[ {\begin{array} {ccc} 8 & 5 & 9 \\ 8 & 3 & 6 \\ 7 & 1 & 8 \end{array} } \right]\\D = \left[ {\begin{array} {ccc} 4 & 2 & 2 \\ 2 & 3 & 5 \\ 5 & 5 & 8 \end{array} } \right]
Find the resulting matrix for cZ + yD when c = 3 and y = 3
a A LaTex expression showing \left[ {\begin{array} {ccc} 36 & 21 & 33 \\ 30 & 18 & 33 \\ 36 & 18 & 48 \end{array} } \right]
b A LaTex expression showing \left[ {\begin{array} {ccc} 7 & 2 & 5 \\ 1 & 5 & 9 \\ 6 & 9 & 3 \end{array} } \right]
c A LaTex expression showing \left[ {\begin{array} {ccc} 6 & 6 & 2 \\ 2 & 2 & 2 \\ 6 & 6 & 5 \end{array} } \right]
d A LaTex expression showing \left[ {\begin{array} {cccccc} 24 & 15 & 27 \\ 24 & 9 & 18 \\ 21 & 3 & 24 \\ 12 & 6 & 6 \\ 6 & 9 & 15 \\ 15 & 15 & 24 \end{array} } \right]
e A LaTex expression showing \left[ {\begin{array} {ccc} 0 & 5 & 7 \\ 3 & 4 & 6 \\ 1 & 2 & 5 \end{array} } \right]
4
Find the resulting matrix for zY + rN when z = 2 and r = 4
A LaTex expression showing Y = \left[ {\begin{array} {ccc} 1 & 8 \\ 6 & 7 \\ 1 & 7 \end{array} } \right] \;\; N = \left[ {\begin{array} {ccc} 8 & 0 \\ 6 & 2 \\ 8 & 3 \end{array} } \right]
a A LaTex expression showing \left[ {\begin{array} {ccc} 3 & 1 \\ 2 & 4 \\ 6 & 7 \end{array} } \right]
b A LaTex expression showing \left[ {\begin{array} {ccc} 34 & 16 \\ 36 & 25 \\ 35 & 23 \end{array} } \right]
c A LaTex expression showing \left[ {\begin{array} {ccc} 2 & 8 \\ 9 & 0 \\ 7 & 1 \end{array} } \right]
d A LaTex expression showing \left[ {\begin{array} {ccc} 34 & 16 \\ 36 & 22 \\ 34 & 26 \end{array} } \right]
5
Find the resulting matrix for rX + nD when r = 3 and n = 3
A LaTex expression showing X = \left[ {\begin{array} {cc} 8 \\ 0 \end{array} } \right] \;\; D = \left[ {\begin{array} {cc} 1 \\ 6 \end{array} } \right]
a A LaTex expression showing \left[ {\begin{array} {cc} 1 \\ 3 \end{array} } \right]
b A LaTex expression showing \left[ {\begin{array} {cc} 27 \\ 18 \end{array} } \right]
c A LaTex expression showing undefined
d A LaTex expression showing \left[ {\begin{array} {cc} 7 \\ 9 \end{array} } \right]
e A LaTex expression showing \left[ {\begin{array} {cc} 6 \\ 0 \end{array} } \right]
6
Find the resulting matrix for cP + xY when c = 2 and x = 4
A LaTex expression showing P = \left[ {\begin{array} {c} 3 & 5 \end{array} } \right]\\Y = \left[ {\begin{array} {c} 6 & 0 \end{array} } \right]
a A LaTex expression showing \left[ {\begin{array} {c} 30 & 10 \end{array} } \right]
b A LaTex expression showing \left[ {\begin{array} {cc} 2 & 2 \\ 4 & 4 \end{array} } \right]
c A LaTex expression showing \left[ {\begin{array} {c} 1 & 4 \end{array} } \right]
d A LaTex expression showing \left[ {\begin{array} {c} 9 & 0 \end{array} } \right]
e A LaTex expression showing \left[ {\begin{array} {c} 2 & 3 \end{array} } \right]
7
Find the resulting matrix for nR + xZ when n = 4 and x = 2
A LaTex expression showing R = \left[ {\begin{array} {cc} 4 & 6 \\ 9 & 0 \end{array} } \right]\\Z = \left[ {\begin{array} {cc} 3 & 4 \\ 7 & 6 \end{array} } \right]
a A LaTex expression showing \left[ {\begin{array} {cc} 5 & 1 \\ 0 & 8 \end{array} } \right]
b A LaTex expression showing \left[ {\begin{array} {cc} 22 & 30 \\ 50 & 12 \end{array} } \right]
c A LaTex expression showing \left[ {\begin{array} {cc} 22 & 32 \\ 50 & 12 \end{array} } \right]
d A LaTex expression showing \left[ {\begin{array} {cc} 22 & 32 \\ 51 & 13 \end{array} } \right]
e A LaTex expression showing \left[ {\begin{array} {cc} 6 & 4 \\ 7 & 9 \end{array} } \right]