Question

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$\large \bold \red {Question}$

∆ FIND THE SUM OF SUITABLE REARRANGEMENTS :- ∆

$\bold{a)} \: \large \bold{ - 142 + 311 + ( - 58)}$
$\bold{b)} \: \large \bold{143 + ( - 567) + 167 + 257}$
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Answer 1

Step-by-step explanation:

a) - 142 + 311 + (-58)

= - 142 + 311 - 58

= 169-58

= 111

b) 143 + (-567) + 167 + 257

= 143 - 567 + 167 + 257

= 143 - 567 + 424

= 143 - 991

= -854

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Answer 2

a) - 142 + 311 + (-58)

----------------

Given :

• - 142 + 311 + (-58)

To find :

• the sum of suitable rearrangements

Solution :

⇒ Here, we are asked to find the sum of -142 + 311 + (-58) by using suitable rearrangements. So, let's rearrange them.

= -142 + 311 + (-58)

= -142 + (-58) + 311

= 84 + 311

= 395

• Therefore, the sum of -142 + 311 + (-58) is 111.

b) 143 + (-567) + 167 + 257

----------------

Given :

• 143 + (-567) + 167 + 257

To find :

• the sum of suitable rearrangements

Solution :

⇒ Here, we are asked to find the sum using suitable rearrangements.

= 143 + (-567) + 167 + 257

= (257 + 143) + (-567 + 167)

= 400 + -400

= 0

• Therefore, the sum of 143 + (-567) + 167 + 257 is 0.