1、加法
695+398 = 2 7+19374= 973 +1193= 8 6+545= 5 65 +9385=
160+7978 = 9 3+866= 6 687935=+ 850682+93= 9 37+103=7
63+78=8
2、減法:
1507-952=8
405-2480=3
2793-8169 529-4234= 8 60 15
5613+4864= 110 4
7075-695=6 08326-12= 5 2 10-1904=2 13426-78 2=97+142= 45+173= 9 8 9+9276= 5 698+ 6129= 10 1-0845= 5107 -4984= 051-40517 = 1 4539-8=5 75-6497 = 7 0-2752= - 3589= 060-1393 = 5 - 567= 081-19166 = 1802-1956=
695+398 = 2 7+19374= 973 +1193= 8 6+545= 5 65 +9385=
160+7978 = 9 3+866= 6 687935=+ 850682+93= 9 37+103=7
63+78=8
2、減法:
1507-952=8
405-2480=3
2793-8169 529-4234= 8 60 15
5613+4864= 110 4
7075-695=6 08326-12= 5 2 10-1904=2 13426-78 2=97+142= 45+173= 9 8 9+9276= 5 698+ 6129= 10 1-0845= 5107 -4984= 051-40517 = 1 4539-8=5 75-6497 = 7 0-2752= - 3589= 060-1393 = 5 - 567= 081-19166 = 1802-1956=