Question

Find using properties :

2/7*(-3/10)-1/14+3/10*3/4

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#Surya

Answer 1

Answer :

We use BODMAS rule.

Now,

$\frac{2}{7} \times ( - \frac{3}{10} ) - \frac{1}{14} + \frac{3}{10} \times \frac{3}{4} \\ \\ = - \frac{6}{70} - \frac{1}{14} + \frac{9}{40} \\ \\ = - \frac{3}{35} - \frac{1}{14} + \frac{9}{40} \\ \\ = \frac{ - 24 - 20 + 63}{280} \\ \\ = \frac{19}{280}$

Here, 280 = LCM (35, 14, 40)

#MarkAsBrainliest

Answer 2

We will answer this with the help of rule BODMAS

B = Brackets

O = Orders 

D = Division

M = Multiplication 

A = Addition

S = Subtraction



= 2/7 × (-3 / 10) - 1 /14 + 3/ 10 × 3/ 4 

= $\frac{2*-3}{7*10}$  - $\frac{1}{14}$ + $\frac{3*3}{10*4}$

= $\frac{-6}{70}$ - $\frac{1}{14}$ + $\frac{9}{40}$

= $\frac{-3}{35}$ - $\frac{1}{14}$ + $\frac{9}{40}$

= LCM of all denominators i.e. 35, 14, 40 = 280

= $\frac{-3*8}{35*8}$ - $\frac{1*20}{14*20}$ + $\frac{9*7}{40*7}$

= $\frac{-24 - 20 + 30}{280}$

= $\frac{19}{280}$




→ First multiplied all the fraction where needed

→ Then reduce the fractions if possible

→ Make fractions like by taking LCM's of all denominators 

→ Add first then subtract as per bodmas rule 

→ Final answer got 




Hope it helped ☺️❤️✨