А) (1800/2/30+18)/6+(70*7-140/2)/60=... б) (60-16/4)/8*40-(80*8-20*5)/6=... помогите...

Question

А) (1800/2/30+18)/6+(70*7-140/2)/60=...
б) (60-16/4)/8*40-(80*8-20*5)/6=...
помогите пожалуйста!!!!!!!!

Answer 1

= (30 + 18)/6 + (490 - 70)/60  = 48/6 + 420/60 = 8 + 7 = 15
= (60 - 4)/8*40 - (640 - 100)/6 = 56/8*40 - 540/6 = 7*40 - 90 = 280 - 90 = 190

Comments

16/4=4 60-4=56 56/8=7 7*40=280 80*8=640 20*5=100 640-100=540 540/6=90 280-90=190

Answer 2

1800÷2=900 900÷30=30 30+18 =48 48÷6=8 70×7 =490 140÷2=70 490-70= 420 420÷60=7 8+7=15
ответ:15

Comments

а ко второму?