Subtract the sum of 126 and (-747) from the sum of 135 and (-136)

620

Step-by-step explanation:

the sum of 126 and (-747) = 126 + (-747)

= 126 - 747 [positive plus negative=negative]

=-621

the sum of 135 and (-136) = 135 + (-136) = 135 - 136

=-1

subtract ⇒

-1 - (-621) = - 1+621 [negative plus negative=positive ]

=620

135 + (-136) = 135 - 136

= - 1

126 + (-747) = - 621

-1 - (-621) = - 1 + 621 = 620

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