a) [(1456+4579)-2859:3]x10=
(6035-953)×10=
6988x10=69 880
b)[(975:5)+(421 111-421086)]:(27590-27580)=
[195+25]:10=
170:10=17. 1382
c)70000-(57700:100+32×41:4:8+1382):1000=
70 000-(577+41+1382):1000=
70000-2000:1000=
70000-2=69 998
d)820 034-[(328 342-263 127)×11]+7 059x48=
820 034-[65 215x11]+338 832=
820 034-717 365+338 832=
102 669+338 832=441 501