1.17*6=102
2.64:16=4
3.4*900=3600
4.102+3600=3702
5.3702-702=3000
1) сначала раскрываем скобки
(23/5)t+23/8-t=2и3/5-3t+3/4
(4и3/5)t-t+3t=3/4+2и3/5-2и7/8
(6и3/5)t=30/40+2и24/40-2и35/40
(33/5)t=19/40
t=19/40 : 33/5
t=19/40 x 5/33
t=19/264
2) (32/3) x 9-10и2/3k+81=107- 1/3k+20
96-10и2/3k+81=107-1/3k+20
1/3k-10и2/3k=107+20-96-81
-10и1/3k=-50
k=50 : (10и1/3)
k=50 x (3/31)
k=150/31
k=4и26/31
1)970*40=38800
2)42071-38800=3271
3)3271*7000=22897000
4)48000:80=600
5)256740*600=136044000
6)22897000-600= 22896400
7)22896400+136044000=158940400