Patulong po please:-) Respect may question po❤️Yung may matinong sagot po sana. Please po ate kuya:-)

Answer:
[tex]1. \: \: 5 \times 16 \: 200 = 81 \: 000[/tex]
[tex]81000 - 200 \: 000 = 120 \: 000[/tex]
[tex] = 120 \: 000[/tex]