Selina solutions

Selina solutions

Selina solutions

Grade 7

CHAPTERS

3. Fractions (Including Problems)

4. Decimal Fractions (Decimals)

5. Exponents (including Laws of Exponents)

6. Ratio and Proportion (Including Sharing in a Ratio)

7. Unitary Method (including Time and Work)

11. Fundamental Concepts (Including Fundamental Operations)

12. Simple Linear Equations (Including Word Problems)

13. Set Concepts (Some Simple Divisions by Vedic Method)

14. Lines and Angles (Including Construction of angles)

17. Symmetry (Including Reflection and Rotation)

18. Recognition of Solids (Representing 3-D in 2-D)

Q1) Convert the following into fractions in their lowest terms:

(i) 3.75

(ii) 0.5

(iii) 2.04

(iv) 0.65

(v) 2.405

(vi) 0.085

(vii) 8.025

Solution 1:

(i) 3.75

= \frac{375}{100}

= \frac{375\div25}{100\div25}=\frac{15}{4}

(ii) 0.5

= \frac{5}{10}

= \frac{5\div5}{10\div5}=\frac{1}{2}

(iii) 2.04

= \frac{204}{100}

= \frac{204\div4}{100\div4}=\frac{51}{25}

(iv) 0.65

= \frac{65}{100}

= \frac{65\div5}{100\div5}=\frac{13}{20}

(v) 2.405

= \frac{2405}{1000}

= \frac{2405\div5}{1000\div5}=\frac{481}{200}

(vi) 0.085

= \frac{85}{1000}

= \frac{85\div5}{1000\div5}=\frac{17}{200}

(vii) 8.025

= \frac{8025}{1000}

= \frac{8025\div25}{1000\div25}=\ \frac{321}{40}

Still have questions? Our expert teachers can help you out

Book a free class nowFractions (Including Problems)

Exponents (including Laws of Exponents)

Ratio and Proportion (Including Sharing in a Ratio)

Unitary Method (including Time and Work)

Fundamental Concepts (Including Fundamental Operations)

Simple Linear Equations (Including Word Problems)

Set Concepts (Some Simple Divisions by Vedic Method)

Lines and Angles (Including Construction of angles)

Symmetry (Including Reflection and Rotation)

Recognition of Solids (Representing 3-D in 2-D)

Q1) Convert the following into fractions in their lowest terms:

(i) 3.75

(ii) 0.5

(iii) 2.04

(iv) 0.65

(v) 2.405

(vi) 0.085

(vii) 8.025

Solution 1:

(i) 3.75

= \frac{375}{100}

= \frac{375\div25}{100\div25}=\frac{15}{4}

(ii) 0.5

= \frac{5}{10}

= \frac{5\div5}{10\div5}=\frac{1}{2}

(iii) 2.04

= \frac{204}{100}

= \frac{204\div4}{100\div4}=\frac{51}{25}

(iv) 0.65

= \frac{65}{100}

= \frac{65\div5}{100\div5}=\frac{13}{20}

(v) 2.405

= \frac{2405}{1000}

= \frac{2405\div5}{1000\div5}=\frac{481}{200}

(vi) 0.085

= \frac{85}{1000}

= \frac{85\div5}{1000\div5}=\frac{17}{200}

(vii) 8.025

= \frac{8025}{1000}

= \frac{8025\div25}{1000\div25}=\ \frac{321}{40}

Still have questions? Our expert teachers can help you out

Book a free class nowLido

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