# Ex.12.1 Q3 Algebraic Expressions Solution - NCERT Maths Class 7

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## Question

Identify the numerical coefficients of terms (other than constants) in the following expressions:

(i) $$5 – 3t^2$$

ii) $$1 + t + t^2 + t^3$$

(iii) $$x + 2xy + 3y$$

(iv) $$100m + 1000n$$

(v) $$– p^2q^2 + 7pq$$

(vi) $$1.2a + 0.8b$$

(vii) $$3.14r^2$$

(viii) $$2(l + b)$$

(ix) $$0.1y + 0.01y^2$$

## Text Solution

 S.No. Expression Term Numerical Coefficient (i) $$5 - 3t^2$$ $$-3t^2$$ $$-3$$ (ii) $$1 + t + t^2 + t^3$$ $$t, t^2$$ and $$t^3$$ $$1, 1$$ and $$1$$ (iii) $$x + 2xy + 3y$$ $$x , 2xy$$ and $$3y$$ $$1, 2$$ and $$3$$ (iv) $$100m + 1000n$$ $$100m$$ and $$1000n$$ $$100$$ and $$1000$$ (v) $$-p^2q^2 + 7pq$$ $$-p^2q^2$$ and $$7pq$$ $$-1$$ and $$7$$ (vi) $$1.2 a + 0.8 b$$ $$1.2a$$ and $$0.8b$$ $$1.2$$ and $$0.8$$ (vii) $$3.14r^2$$ $$3.14r^2$$ $$3.14$$ (viii) $$2(l + b)$$ $$2l$$ and $$2b$$ $$2$$ and $$2$$ (ix) $$0.1y + 0.01y^2$$ $$0.1y$$ and $$0.01 y^2$$ $$0.1$$ and $$0.01$$

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