Пошаговое объяснение:

а) 8919÷9+114240÷21=991+5440=6431

б) 1190–35360÷34+271=1190–1040+271=421

в) 8631–(99+44352÷63)=8631–(99+704)=8631–803=7828

г) 48600×(5045–2040)÷243–(86043÷43+504)×20=

=48600×3005÷243–(2001+504)×20=

=146043000÷243–2505×20=601000–50100=550900

д) 4880–(546+534)÷122–6390×(8004–6924)×213=

=4880–1080×122–6390×1080×213=

=4880–131760–848847600= –848 974 480