Question

Match the following.

• A. 68
• B. 25
• C. -11
• D. 6

Answer 1

i) Sum of 140 and -72
= 140 + (-72)
= 140 - 72
= 68

Thus, sum of 140 and -72 is 68.

ii) Subtract -11 from 14
$\Rightarrow$ 14 - (-11)
= 14 + 11
= 25

Thus, subtraction of -11 from 14 gives 25.

iii) -6 + 7 - 12
= -6 - 12 + 7 [Arranging according the to sign]
= -18 + 7
= -(11+7) + 7
= -11 - 7 + 7
= -11

Thus, -6 + 7 - 12 = -11

iv) 5 + 11 - 10
= 16 - 10
= 6

Thus, 5 + 11 - 10 = 6.