Question

11. solve a) (-131) +321-80-13 b) (-71) +(-58) +(-90)
12. a) the sum of two integers is - 38. if one of them is 240. find the
other number.
b) A bus travelled 30 km to south, then 40 km to north and from 30
km to west. how for did the bus travel ?​

Answer 1

Answer:

b).The bus travelled 100km

Answer 2

$\red{ 11. Simplify\: a ) (-131) + 321 - 80 - 13 }$

$= -131 + 321 - 80 - 13$

$= 190 - 93$

$= 97$

Therefore.,

$\red{ (-131) + 321 - 80 - 13 }\green { = 97 }$

$\red{ 12. Simplify\: b) (-71) + (-58) +(- 90) }$

$= -71 + (-58) + (-90)$

$= -71 - 58 - 90$

$= -129 - 90$

$= - 219$

Therefore.,

$\red{ (-71) + (-58) +(- 90) }\green { = -219}$

$12. a ) Let \: x \: and \: y \: are \: two \:integers$

$Given \: x = 240 \: and$

$x + y = -38$

$\implies 240 + y = -38$

$\implies y = -38 - 240$

$\implies y = -278$

Therefore.,

$\red{ Required \:other \: number } \green { = -278 }$

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