Identify the numerical coefficients of terms (other than constants) in the following expressions:
(i) 5 – 3t2
(ii) 1 + t + t2 + t3
(iii) x + 2xy + 3y
(iv) 100m + 1000n
(v) – p2q2 + 7pq
(vi) 1.2 a + 0.8 b
(vii) 3.14 r2
(viii) 2 (l + b)
(ix) 0.1 y + 0.01 y2
(i) 5 – 3t2
(ii) 1 + t + t2 + t3
(iii) x + 2xy + 3y
(iv) 100m + 1000n
(v) – p2q2 + 7pq
(vi) 1.2 a + 0.8 b
(vii) 3.14 r2
(viii) 2 (l + b)
(ix) 0.1 y + 0.01 y2
Solution and Explanation
(i) 5 – 3t2 : Terms- -3t2 Numerical coefficient - -3
(ii) 1+ t +t2+t3: Terms- t, t2,t3 Numerical coefficient - 1 1 1
(iii) x+2xy+3y: Terms- x,2xy,3y Numerical coefficient - 1 2 3
(iv) 100m+1000n: Terms- 100m, 1000n Numerical coefficient - 100 1000
(v) –p2q2+7pq: Terms- -p2q2 7pq Numerical coefficient - -1,7
(vi) 1.2a+0.8b: Terms- 1.2a 0.8b Numerical coefficient - 1.2, 0.8
(vii) 3.14r2: Terms- 3.14r2 Numerical coefficient - 3.14
(viii) 2(l+b)=2l+2b: Terms- 2l 2b Numerical coefficient - 2 2
(ix) 0.1y+0.01y2: Terms- 0.1y 0.01y2 Numerical coefficient - 0.1 0.01
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Questions Asked in CBSE Class VII exam
- Multiply and reduce to lowest form (if possible) :
(i) \(\frac{2}{3}\) × 2 \(\frac{2}{3}\)
(ii) \(\frac{2}{7}\) × \(\frac{7}{9}\)
(iii) \(\frac{3}{8}\) × \(\frac{6}{4}\)
(iv) \(\frac{9}{4}\) × \(\frac{3}{5}\)
(v) \(\frac{1}{3}\)× \(\frac{15}{8}\)
(vi) \(\frac{11}{2}\) × \(\frac{3}{10}\)
(vii) \(\frac{4}{5}\) × \(\frac{12}{7}\)- CBSE Class VII
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- Find the product:
(i)\(\frac{9}{2}\)×(-\(\frac{7}{4}\))
(ii) \(\frac{3}{10}\)×(-9)
(iii) -\(\frac{6}{5}\)×\(\frac{9}{11}\)
(iv) \(\frac{3}{7}\)×(-\(\frac{2}{5}\))
(v) \(\frac{3}{11}\)×\(\frac{2}{5}\)
(vi) \(\frac{3}{-5}\) ×\(\frac{-5}{3}\)- CBSE Class VII
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- Draw, wherever possible, a rough sketch of
- a triangle with both line and rotational symmetries of order more than 1.
- a triangle with only line symmetry and no rotational symmetry of order more than 1.
- a quadrilateral with a rotational symmetry of order more than 1 but not a line symmetry.
- a quadrilateral with line symmetry but not a rotational symmetry of order more than 1.
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- Multiply and reduce to the lowest form and convert into a mixed fraction:
(i) 7 × \(\frac{3}{5}\)
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(viii) 20 × \(\frac{4}{5}\)
(ix) 13 × \(\frac{1}{3}\)
(x) 15 × \(\frac{3}{5}\)- CBSE Class VII
- Multiplication Of Fractions
Using laws of exponents, simplify and write the answer in exponential form:
(i) 32 × 34 × 38 (ii) 615 ÷ 610 (iii) a3 × a2 (iv) 7x×72 (v) (52) ÷ 53 (vi) 25 × 55 (vii) a4 × b4 (viii) (34)3(ix) (220 ÷ 215)×23 (x) 8t ÷ 82- CBSE Class VII
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