文档介绍：158+262+138
375+219+381+225
5001-247-1021-232
(181+2564) +2719
378+44+114+242+222 276+228+353+219
(375+1034)+(966+14-5
6304-42
456- (256-36)
102X35 98X42
158+262+138
375+219+381+225
5001-247-1021-232
(181+2564)
+2719
378+44+114+242+222
276+228+353+219
(375+1034) + (966+125)
(2130+783+270)+1017
99+999+9999+99999
7755-(2187+755)
2214+638+286
3065-738-1065
899+344
2357-183-317-357
2365-1086-214
497-299
2370+1995
3999+498
1883-398
12X25
75X24
138X25X4
(13X125) X (3X8)
(12+24+80)X50
25X32X 125
32X (25+125)
88X125
102X76
178X101-178
84X36+64X84
75X99+2X75
98X 199 123X 18-123X3+85X 123 50X (34X4) X3
25X (24+16)
178X99+178
79X42+79+79X57
73004-254-4
81004-44-75
158+262+138
1248^-24
31504-15
48004-25
21500^-125
375+219+381+225
5001-247-1021-232
(181+2564) +2719
378+44+114+242+222
276+228+353+219
(375+1034) + (966+125)
(2130+783+270)+1017
99+999+9999+99999
7755-(2187+755)
2214+638+286 3065-738-1065 899+344
2357-183-317-357
2365-1086-214
497-299
(12+24+80) X50
704X25
25X32X 125
32X (25+125)
2370+1995
3999+498
1883-398
12X25
75X24
138X25X4 (13X 125) X (3X8)
88X125
102X76
58X98
178X101-178
84X36+64X84 75X99+2X75 83X 102-83X2 98X 199
123X 18-123X3+85X 123 50X (34X4) X3 25X (24+16)
178X99+178
79X42+79+79X57
215004-125
73004-254-4
81004-44-75
16800^-120
(a+b) + c = a + (b + c)
2. 73 + + 1. 27
4. 37 + + 1. 63 + 5. 72
a—b—c = a
(b + c)
10 - — 2. 568
9. 3 - 5. 26 - 2. 74
14. 9- (5. 2 + 4. 9)
18. 32 - 5. 47 - 4. 32
(a X b) Xc = a X
(b X c)
25 X 6. 8 X 0. 04
0. 25 X 32 X 0. 125
6. 4 X 1. 25 X 12. 5
c X (a+b) = cXa + cXb
X 201
0. 58 X 10. 1
50. 2 X 99 X
2. 1 X 99 + 2. 1
3. 28 X 5. 7 + 6. 72 X 5. 7
23 X 0. 1 + 2. 3 X
0