Explicație pas cu pas:
1) a) 4567+823=5390
b) 1342-298=1044
c) 137×876=120012
d) 50120:5=10024
2) a) 19356+683=20039
b) 1257-1087=170
c) 709×183=129747
d) 9963:27=369
e) 18582:489=38
3) a) [(10+2×3)×4-7×5)]×3+200
=[(10+6)×4-35)]×3+200
=(16×4-35)×3+200
=(64-35)×3+200
=29×3+200
=87+200
=287
b) 66-11×[9-3(144×12-10)]
=66-11×[9-3(1728-10)]
=66-11×(9-3×1718)
=66-11×(6×1718)
=55×10308
=680328
