计算: (1)399999+39999+3999+399+39+3 (2)20-
题型:解答题
问题:
计算:
(1)399999+39999+3999+399+39+3
(2)20-19+18-17+…+4-3+2-1
(3)100+99+98-97-96-95+94+93+92-91-90-89+88+…+10+9+8-7-6-5+4+3+2-1
(4)8888×125.
计算:
(1)399999+39999+3999+399+39+3
(2)20-19+18-17+…+4-3+2-1
(3)100+99+98-97-96-95+94+93+92-91-90-89+88+…+10+9+8-7-6-5+4+3+2-1
(4)8888×125.