用简便方法几算下面个题； 3/4+1/4*4/5+4/5 999*7+37*111 139*137/138-137*1/138 （0.8+一百二十五分之一

用简便方法几算下面个题； 3/4+1/4*4/5+4/5 999*7+37*111 139*137/138-137*1/138 （0.8+一百二十五分之一
用简便方法几算下面个题； 3/4+1/4*4/5+4/5 999*7+37*111 139*137/138-137*1/138 （0.8+一百二十五分之一

用简便方法几算下面个题； 3/4+1/4*4/5+4/5 999*7+37*111 139*137/138-137*1/138 （0.8+一百二十五分之一
+ 7 × 9 ÷ 3
2: 3 + (7 × 9) ÷ 3
3: 3 + (7 × 9 ÷ 3)
4: 3 + ((7 × 9) ÷ 3)
5: 3 + (7 × (9 ÷ 3))
6: 3 + 7 ×(9 ÷ 3)
7: 3 × 7 + 9 ÷ 3
8: (3 × 7) + 9 ÷ 3
9: 3 × 7 +(9 ÷ 3)
10: (3 × 7) + (9 ÷ 3)
11: 3 + 7 ÷ 3 × 9
12: 3 + (7 ÷ 3) × 9
13: 3 + (7 ÷ 3 × 9)
14: 3 + ((7 ÷ 3) × 9)
15: 3 + (7 ÷ (3 ÷ 9))
16: 3 + 7 ÷(3 ÷ 9)
17: (3 - 7) × (3 - 9)
18: 3 + 9 × 7 ÷ 3
19: 3 + (9 × 7) ÷ 3
20: 3 + (9 × 7 ÷ 3)
21: 3 + ((9 × 7) ÷ 3)
22: 3 + (9 × (7 ÷ 3))
23: 3 + 9 ×(7 ÷ 3)
24: 3 + 9 ÷ 3 × 7
25: 3 + (9 ÷ 3) × 7
26: 3 + (9 ÷ 3 × 7)
27: 3 + ((9 ÷ 3) × 7)
28: 3 + (9 ÷ (3 ÷ 7))
29: 3 + 9 ÷(3 ÷ 7)
30: (3 - 9) × (3 - 7)
31: (7 - 3) × (9 - 3)
32: 7 × 3 + 9 ÷ 3
33: (7 × 3) + 9 ÷ 3
34: 7 × 3 +(9 ÷ 3)
35: (7 × 3) + (9 ÷ 3)
36: 7 ÷ 3 × 9 + 3
37: (7 ÷ 3) × 9 + 3
38: (7 ÷ 3 × 9) + 3
39: ((7 ÷ 3) × 9) + 3
40: (7 ÷ (3 ÷ 9)) + 3
41: 7 ÷ (3 ÷ 9) + 3
42: 7 × 9 ÷ 3 + 3
43: (7 × 9) ÷ 3 + 3
44: (7 × 9 ÷ 3) + 3
45: ((7 × 9) ÷ 3) + 3
46: (7 × (9 ÷ 3)) + 3
47: 7 × (9 ÷ 3) + 3
48: (9 - 3) × (7 - 3)
49: 9 ÷ 3 + 7 × 3
50: (9 ÷ 3) + 7 × 3
51: 9 ÷ 3 +(7 × 3)
52: (9 ÷ 3) + (7 × 3)
53: 9 ÷ 3 × 7 + 3
54: (9 ÷ 3) × 7 + 3
55: (9 ÷ 3 × 7) + 3
56: ((9 ÷ 3) × 7) + 3
57: (9 ÷ (3 ÷ 7)) + 3
58: 9 ÷ (3 ÷ 7) + 3
59: 9 ÷ 3 + 3 × 7
60: (9 ÷ 3) + 3 × 7
61: 9 ÷ 3 +(3 × 7)
62: (9 ÷ 3) + (3 × 7)
63: 9 × 7 ÷ 3 + 3
64: (9 × 7) ÷ 3 + 3
65: (9 × 7 ÷ 3) + 3
66: ((9 × 7) ÷ 3) + 3
67: (9 × (7 ÷ 3)) + 3
68: 9 × (7 ÷ 3) + 3
1, 4, 4, 5
1: 1 × 4 + 4 × 5
2: (1 × 4) + 4 × 5
3: 1 × (4 + 4 × 5)
4: 1 × (4 + (4 × 5))
5: 1 × 4 +(4 × 5)
6: (1 × 4) + (4 × 5)
7: 1 × 4 + 5 × 4
8: (1 × 4) + 5 × 4
9: 1 × (4 + 5 × 4)
10: 1 × (4 + (5 × 4))
11: 1 × 4 +(5 × 4)
12: (1 × 4) + (5 × 4)
13: 1 × 4 × 5 + 4
14: (1 × 4) × 5 + 4
15: (1 × 4 × 5) + 4
16: ((1 × 4) × 5) + 4
17: (1 × (4 × 5)) + 4
18: 1 × (4 × 5) + 4
19: 1 × (4 × 5 + 4)
20: 1 × ((4 × 5) + 4)
21: 1 × 5 × 4 + 4
22: (1 × 5) × 4 + 4
23: (1 × 5 × 4) + 4
24: ((1 × 5) × 4) + 4
25: (1 × (5 × 4)) + 4
26: 1 × (5 × 4) + 4
27: 1 × (5 × 4 + 4)
28: 1 × ((5 × 4) + 4)
29: 4 + 1 × 4 × 5
30: 4 + (1 × 4) × 5
31: 4 + (1 × 4 × 5)
32: 4 + ((1 × 4) × 5)
33: 4 + (1 × (4 × 5))
34: 4 + 1 ×(4 × 5)
35: 4 × 1 + 4 × 5
36: (4 × 1) + 4 × 5
37: 4 × 1 +(4 × 5)
38: (4 × 1) + (4 × 5)
39: 4 ÷ 1 + 4 × 5
40: (4 ÷ 1) + 4 × 5
41: 4 ÷ 1 +(4 × 5)
42: (4 ÷ 1) + (4 × 5)
43: 4 + 1 × 5 × 4
44: 4 + (1 × 5) × 4
45: 4 + (1 × 5 × 4)
46: 4 + ((1 × 5) × 4)
47: 4 + (1 × (5 × 4))
48: 4 + 1 ×(5 × 4)
49: 4 × 1 + 5 × 4
50: (4 × 1) + 5 × 4
51: 4 × 1 +(5 × 4)
52: (4 × 1) + (5 × 4)
53: 4 × 1 × 5 + 4
54: (4 × 1) × 5 + 4
55: (4 × 1 × 5) + 4
56: ((4 × 1) × 5) + 4
57: (4 × (1 × 5)) + 4
58: 4 × (1 × 5) + 4
59: 4 ÷ 1 + 5 × 4
60: (4 ÷ 1) + 5 × 4
61: 4 ÷ 1 +(5 × 4)
62: (4 ÷ 1) + (5 × 4)
63: 4 ÷ 1 × 5 + 4
64: (4 ÷ 1) × 5 + 4
65: (4 ÷ 1 × 5) + 4
66: ((4 ÷ 1) × 5) + 4
67: (4 ÷ (1 ÷ 5)) + 4
68: 4 ÷ (1 ÷ 5) + 4
69: 4 + 4 × 1 × 5
70: 4 + (4 × 1) × 5
71: 4 + (4 × 1 × 5)
72: 4 + ((4 × 1) × 5)
73: 4 + (4 × (1 × 5))
74: 4 + 4 ×(1 × 5)
75: 4 + 4 ÷ 1 × 5
76: 4 + (4 ÷ 1) × 5
77: 4 + (4 ÷ 1 × 5)
78: 4 + ((4 ÷ 1) × 5)
79: 4 + (4 ÷ (1 ÷ 5))
80: 4 + 4 ÷(1 ÷ 5)
81: 4 + 4 × 5 × 1
82: (4 + 4 × 5) × 1
83: (4 + (4 × 5)) × 1
84: 4 + (4 × 5) × 1
85: 4 + (4 × 5 × 1)
86: 4 + ((4 × 5) × 1)
87: 4 + (4 × (5 × 1))
88: 4 + 4 ×(5 × 1)
89: 4 + 4 × 5 ÷ 1
90: (4 + 4 × 5) ÷ 1
91: (4 + (4 × 5)) ÷ 1
92: 4 + (4 × 5) ÷ 1
93: 4 + (4 × 5 ÷ 1)
94: 4 + ((4 × 5) ÷ 1)
95: 4 + (4 × (5 ÷ 1))
96: 4 + 4 ×(5 ÷ 1)
97: 4 + 5 × 1 × 4
98: 4 + (5 × 1) × 4
99: 4 + (5 × 1 × 4)
100: 4 + ((5 × 1) × 4)
101: 4 + (5 × (1 × 4))
102: 4 + 5 ×(1 × 4)
103: 4 + 5 ÷ 1 × 4
104: 4 + (5 ÷ 1) × 4
105: 4 + (5 ÷ 1 × 4)
106: 4 + ((5 ÷ 1) × 4)
107: 4 + (5 ÷ (1 ÷ 4))
108: 4 + 5 ÷(1 ÷ 4)
109: 4 × 5 + 1 × 4
110: (4 × 5) + 1 × 4
111: 4 × 5 +(1 × 4)
112: (4 × 5) + (1 × 4)
113: 4 × 5 × 1 + 4
114: (4 × 5) × 1 + 4
115: (4 × 5 × 1) + 4
116: ((4 × 5) × 1) + 4
117: (4 × (5 × 1)) + 4
118: 4 × (5 × 1) + 4
119: 4 × 5 ÷ 1 + 4
120: (4 × 5) ÷ 1 + 4
121: (4 × 5 ÷ 1) + 4
122: ((4 × 5) ÷ 1) + 4
123: (4 × (5 ÷ 1)) + 4
124: 4 × (5 ÷ 1) + 4
125: 4 + 5 × 4 × 1
126: (4 + 5 × 4) × 1
127: (4 + (5 × 4)) × 1
128: 4 + (5 × 4) × 1
129: 4 + (5 × 4 × 1)
130: 4 + ((5 × 4) × 1)
131: 4 + (5 × (4 × 1))
132: 4 + 5 ×(4 × 1)
133: 4 + 5 × 4 ÷ 1
134: (4 + 5 × 4) ÷ 1
135: (4 + (5 × 4)) ÷ 1
136: 4 + (5 × 4) ÷ 1
137: 4 + (5 × 4 ÷ 1)
138: 4 + ((5 × 4) ÷ 1)
139: 4 + (5 × (4 ÷ 1))
140: 4 + 5 ×(4 ÷ 1)
141: 4 × 5 + 4 × 1
142: (4 × 5) + 4 × 1
143: (4 × 5 + 4) × 1
144: ((4 × 5) + 4) × 1
145: 4 × 5 +(4 × 1)
146: (4 × 5) + (4 × 1)
147: 4 × 5 + 4 ÷ 1
148: (4 × 5) + 4 ÷ 1
149: (4 × 5 + 4) ÷ 1
150: ((4 × 5) + 4) ÷ 1
151: 4 × 5 +(4 ÷ 1)
152: (4 × 5) + (4 ÷ 1)
153: 5 × 1 × 4 + 4
154: (5 × 1) × 4 + 4
155: (5 × 1 × 4) + 4
156: ((5 × 1) × 4) + 4
157: (5 × (1 × 4)) + 4
158: 5 × (1 × 4) + 4
159: 5 ÷ 1 × 4 + 4
160: (5 ÷ 1) × 4 + 4
161: (5 ÷ 1 × 4) + 4
162: ((5 ÷ 1) × 4) + 4
163: (5 ÷ (1 ÷ 4)) + 4
164: 5 ÷ (1 ÷ 4) + 4
165: 5 × 4 + 1 × 4
166: (5 × 4) + 1 × 4
167: 5 × 4 +(1 × 4)
168: (5 × 4) + (1 × 4)
169: 5 × 4 × 1 + 4
170: (5 × 4) × 1 + 4
171: (5 × 4 × 1) + 4
172: ((5 × 4) × 1) + 4
173: (5 × (4 × 1)) + 4
174: 5 × (4 × 1) + 4
175: 5 × 4 ÷ 1 + 4
176: (5 × 4) ÷ 1 + 4
177: (5 × 4 ÷ 1) + 4
178: ((5 × 4) ÷ 1) + 4
179: (5 × (4 ÷ 1)) + 4
180: 5 × (4 ÷ 1) + 4
181: 5 × 4 + 4 × 1
182: (5 × 4) + 4 × 1
183: (5 × 4 + 4) × 1
184: ((5 × 4) + 4) × 1
185: 5 × 4 +(4 × 1)
186: (5 × 4) + (4 × 1)
187: 5 × 4 + 4 ÷ 1
188: (5 × 4) + 4 ÷ 1
189: (5 × 4 + 4) ÷ 1
190: ((5 × 4) + 4) ÷ 1
191: 5 × 4 +(4 ÷ 1)
192: (5 × 4) + (4 ÷ 1)
6,8,8,9
1: (8 + 8) ÷ 6 × 9
2: ((8 + 8) ÷ 6) × 9
3: (8 + 8) ÷ (6 ÷ 9)
4: (8 + 8) × 9 ÷ 6
5: ((8 + 8) × 9) ÷ 6
6: (8 + 8) × (9 ÷ 6)
7: 8 × 9 - 6 × 8
8: (8 × 9) - 6 × 8
9: 8 × 9 -(6 × 8)
10: (8 × 9) - (6 × 8)
11: 8 × 9 - 8 × 6
12: (8 × 9) - 8 × 6
13: 8 × 9 -(8 × 6)
14: (8 × 9) - (8 × 6)
15: 9 ÷ 6 ×(8 + 8)
16: (9 ÷ 6) × (8 + 8)
17: 9 ÷ (6 ÷ (8 + 8))
18: 9 × 8 - 6 × 8
19: (9 × 8) - 6 × 8
20: 9 × 8 -(6 × 8)
21: (9 × 8) - (6 × 8)
22: (9 × (8 + 8)) ÷ 6
23: 9 × (8 + 8) ÷ 6
24: 9 × ((8 + 8) ÷ 6)
25: 9 × 8 - 8 × 6
26: (9 × 8) - 8 × 6
27: 9 × 8 -(8 × 6)
28: (9 × 8) - (8 × 6)
2 8 9 13
1: (2 - 8) × (9 - 13)
2: 2 × (8 - 9 + 13)
3: 2 × ((8 - 9) + 13)
4: 2 × (8 - (9 - 13))
5: 2 × (8 + 13 - 9)
6: 2 × ((8 + 13) - 9)
7: 2 × (8 + (13 - 9))
8: 2 × (13 + 8 - 9)
9: 2 × ((13 + 8) - 9)
10: 2 × (13 + (8 - 9))
11: 2 × (13 - 9 + 8)
12: 2 × ((13 - 9) + 8)
13: 2 × (13 - (9 - 8))
14: (8 - 2) × (13 - 9)
15: (8 - 9 + 13) × 2
16: ((8 - 9) + 13) × 2
17: (8 - (9 - 13)) × 2
18: (8 + 13 - 9) × 2
19: ((8 + 13) - 9) × 2
20: (8 + (13 - 9)) × 2
21: 9 ÷ (2 - 13 ÷ 8)
22: 9 ÷ (2 - (13 ÷ 8))
23: (9 - 13) × (2 - 8)
24: (13 + 8 - 9) × 2
25: ((13 + 8) - 9) × 2
26: (13 + (8 - 9)) × 2
27: (13 - 9 + 8) × 2
28: ((13 - 9) + 8) × 2
29: (13 - (9 - 8)) × 2
请用科学计算器置入公式.