请你在下面的三道算式了分别填上合适的运算符号,使算式成立.2 3 4 5 6 7 1=51 5 6 7 1 2 3 4=51 6 7 1 2 3 4 5 6 7 1=515 6 7 1 2 3 4=516 7 1 2 3 4 5=51

请你在下面的三道算式了分别填上合适的运算符号,使算式成立.2 3 4 5 6 7 1=51 5 6 7 1 2 3 4=51 6 7 1 2 3 4 5 6 7 1=515 6 7 1 2 3 4=516 7 1 2 3 4 5=51
请你在下面的三道算式了分别填上合适的运算符号,使算式成立.2 3 4 5 6 7 1=51 5 6 7 1 2 3 4=51 6 7 1
2 3 4 5 6 7 1=51
5 6 7 1 2 3 4=51
6 7 1 2 3 4 5=51

请你在下面的三道算式了分别填上合适的运算符号,使算式成立.2 3 4 5 6 7 1=51 5 6 7 1 2 3 4=51 6 7 1 2 3 4 5 6 7 1=515 6 7 1 2 3 4=516 7 1 2 3 4 5=51
只填运算符号,没让加括号啊：
2+3*4+5*6+7*1 = 51
5+6*7+1+2-3+4 = 51
6*7+1+2-3+4+5 = 51

2*( 3+ 4 +5+ 6 +7) +1=51
5+6 *7 +1 +2- 3 +4=51
(6+ 7+ 1 ）*2 +3 +4 *5=51

10 nut consumption taboos: To your health, please take 2 minutes after reading the two taboos ◆ 10 walnut nut consumption of antioxidant called the Effects and contraindications: American Dietetic Ass...

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10 nut consumption taboos: To your health, please take 2 minutes after reading the two taboos ◆ 10 walnut nut consumption of antioxidant called the Effects and contraindications: American Dietetic Association recommends people eat two or three times a week is best walnuts, particularly the elderly and postmenopausal women, because the arginine contained walnuts,Maccosmetics, oleic acid, antioxidant and so on cardiovascular protection, prevention of coronary heart disease,mac brushes, stroke, Alzheimer's, etc. is quite helpful. One should not eat too much, otherwise it will affect digestion. Some people like to brown the surface of the thin-skinned walnut stripped, it will lose some of nutrition, so do not peel the layer of skin. ◆ kidney Chestnut Chestnut benefit of adjuvant therapy is also called Effects and contraindications: the chestnut is rich in dietary fiber, soft, diabetic patients may also be appropriate taste. But difficult to digest raw chestnuts, cooked and easy to stagnation gas, so one should not eat. Best as a snack between meals to chestnut, or do eat in the food, not a lot to eat after a meal to avoid excessive intake of calories, not conducive to maintaining body weight.
moldy fresh chestnuts is easy to eat a moldy chestnuts may be toxic, so the deterioration of the chestnut can not eat. ◆ sunflower seeds in the crowd is very rich in nutrients
Effects and contraindications: eating a handful of sunflower seeds per day, the day the body will be able to meet the requirements of vitamin E. Sunflower seeds contain protein can be comparable with a variety of meat, in particular,Mac cosmetics, contain an essential arginine to manufacture sperm. Constant nibbling on the prevention of coronary heart disease eating sunflower seeds, stroke, lower blood pressure, have a role in protecting blood vessel elasticity. Physician that the sunflower seeds can cure insomnia, improve memory, prevent cancer, hypertension and neurasthenia have a certain effect. ◆ pistachios can be described as the Friends of the heart
Containing mainly monounsaturated fatty acids, unlike other nuts, pistachios so easy to rancidity, can reduce cholesterol levels and reduce heart disease.
role and Taboo: time to eat the equivalent of eating 10 pistachios 1.5 g monounsaturated fatty acids. Too long storage time should not be eating pistachios. Pistachio has a high heat, and contain more fat, people who Papan, people should eat less high blood lipids. ◆ Sweet Almond
Sweet almond with 50% fat, 25% protein, 10% carbohydrate and vitamin E and calcium, magnesium, boron, potassium and other elements.
effects and contraindications: Vegetables almond coronary heart disease, angina who likely do not eat less than 50%. Almonds have a moderating effect of insulin and blood glucose levels, but also impaired glucose tolerance and diabetes is one of the therapeutic products. Almonds are rich in boron and calcium in preventing osteoporosis in menopausal women also have some benefits. ◆ hazelnut
Nutrient-rich hazelnut, eight amino acids needed by the body and taste everything, and its content is much higher than the walnut.
role and Taboo: hazelnut in calcium, phosphorus, iron content than other nuts. Because of its nutrient-rich, sweet flavor, since ancient times people took it as a treasure fruit, hazelnut sweet natured, has energy and the spleen, diarrhea, eyesight, deworming and other effects. ◆ pumpkin seeds with insecticides and the effectiveness of treatment of prostate disease
Role and taboo: The United States study found that eating 50 grams a day pumpkin seeds can be more effective in preventing prostate disease and prostate cancer. Pumpkin seeds are rich in pantothenic acid, pantothenic acid can relieve angina at rest, and has blood pressure. However, we should note that one should not eat too much, there have been a result of excessive consumption of pumpkin seeds dizziness were reported. Hypertensive patients most suitable for human consumption, the patient should be deprivation of stomach, abdominal distension or feel bored. ◆ peanuts are rich in quality protein and fat and a variety of micronutrients
Effects and contraindications: After adjusting people, especially children, nutritional balance has a very important role. Scientists recently discovered that a large number of arginine and peanuts contain resveratrol, the former role of potential anti-TB, which can inhibit cancer cell invasion and proliferation, it is quite good in patients with tuberculosis and cancer therapeutic products. However, an increase in platelet count Peanut, antifibrinolytic effect, it hyperviscosity are advised to eat peeled. Peanut digestion and absorption is low, excessive consumption will increase the burden on the stomach, need attention. ◆ pine known as the Effects and contraindications: pine nuts contain protein, fat, carbohydrates. Fat contained in most of linoleic acid, linolenic acid and other healthy essential fatty acids, calcium, phosphorus, iron and other content is also very rich, eat to nourish physical. Stored for a long time will have rancid taste, unsuitable for consumption. Gall bladder dysfunction should Shensi. ◆ cashew nuts in the 47% fat, 22% protein
Effects and contraindications: Compared with other nuts, cashew nuts in the negative on the human body to be slightly higher content of saturated fatty acids, accounting for about 20%. Therefore, we should avoid eating too much. In addition, the cashew nut contains a variety of allergens, for people with allergies, may cause some allergic reactions. Thus, the first person to eat cashew nuts, it is best not to eat, can eat stop ten minutes after twelve, if you do not eat an allergic reaction.
Twenty medicinal value of whole grains















































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(2+3×4+5×6+7 )×1=51
(5×6+7)×1+(2+3×4)=51
6×7+(1+2-3)+4+5=51

（－2＋3）×4×（5＋6）＋（7×1）=51
〔5＋6〕×〔7－1－2〕＋3＋4 =51
6×〔7×（－1＋2）＋3〕－4－5 =51