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Add: -7mn + 5, 12mn + 2, 9mn - 8, -2mn - 3 - CBSE Class 7 - Mathematics

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Question

Add: -7mn + 5, 12mn + 2, 9mn - 8, -2mn - 3

Solution

(-7mn + 5) + (12mn + 2) + (9mn - 8) + (-2mn - 3)

= -7mn + 5 + 12mn + 2 + 9mn - 8 − 2mn - 3

= -7mn + 12mn + 9mn - 2mn + 5 + 2 - 8 - 3

= mn (-7 + 12 + 9 - 2) + (5 + 2 - 8 - 3)

= 12mn - 4

  Is there an error in this question or solution?

APPEARS IN

 NCERT Solution for Mathematics for Class 7 (2018 to Current)
Chapter 12: Algebraic Expressions
Ex. 12.20 | Q: 2.03 | Page no. 239
Solution Add: -7mn + 5, 12mn + 2, 9mn - 8, -2mn - 3 Concept: Addition and Subtraction of Algebraic Expressions.
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