1.用+、-、*(乘)、/(除)连接各数,使算式成立.(前面我都知道了,就差这道题.)1 2 3 4 5 6 7 8 =12.添括号是等式成立.20+30*12-6=20020+30*12-6=30020+30*12-6=37420+30*12-6=594
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![1.用+、-、*(乘)、/(除)连接各数,使算式成立.(前面我都知道了,就差这道题.)1 2 3 4 5 6 7 8 =12.添括号是等式成立.20+30*12-6=20020+30*12-6=30020+30*12-6=37420+30*12-6=594](/uploads/image/z/2611510-70-0.jpg?t=1.%E7%94%A8%2B%E3%80%81-%E3%80%81%2A%EF%BC%88%E4%B9%98%29%E3%80%81%2F%28%E9%99%A4%29%E8%BF%9E%E6%8E%A5%E5%90%84%E6%95%B0%2C%E4%BD%BF%E7%AE%97%E5%BC%8F%E6%88%90%E7%AB%8B.%EF%BC%88%E5%89%8D%E9%9D%A2%E6%88%91%E9%83%BD%E7%9F%A5%E9%81%93%E4%BA%86%2C%E5%B0%B1%E5%B7%AE%E8%BF%99%E9%81%93%E9%A2%98.%EF%BC%891+2+3+4+5+6+7+8+%3D12.%E6%B7%BB%E6%8B%AC%E5%8F%B7%E6%98%AF%E7%AD%89%E5%BC%8F%E6%88%90%E7%AB%8B.20%2B30%2A12-6%3D20020%2B30%2A12-6%3D30020%2B30%2A12-6%3D37420%2B30%2A12-6%3D594)
1.用+、-、*(乘)、/(除)连接各数,使算式成立.(前面我都知道了,就差这道题.)1 2 3 4 5 6 7 8 =12.添括号是等式成立.20+30*12-6=20020+30*12-6=30020+30*12-6=37420+30*12-6=594
1.用+、-、*(乘)、/(除)连接各数,使算式成立.
(前面我都知道了,就差这道题.)
1 2 3 4 5 6 7 8 =1
2.添括号是等式成立.
20+30*12-6=200
20+30*12-6=300
20+30*12-6=374
20+30*12-6=594
1.用+、-、*(乘)、/(除)连接各数,使算式成立.(前面我都知道了,就差这道题.)1 2 3 4 5 6 7 8 =12.添括号是等式成立.20+30*12-6=20020+30*12-6=30020+30*12-6=37420+30*12-6=594
1+ 2 -3 -4 *5 +6 +7 +8 =1
20+30*(12-6)=200
(20+30)*(12-6)=300
20+30*12-6=374不用加就可以
(20+30)*12-6=594
1+2*3+4-5-6-7+8=1
20+30*(12-6)=200
(20+30)*(12-6)=300
20+(30*12-6)=374
(20+30)*12-6=594
1、1*2+3-4+5-6-7+8=1
2、20+30*(12-6)=200
(20+30)*(12-6)=300
20+30*12-6=374
(20+30)*12-6=594
(1)(1*2+3-4+5-6-7+8=1
(2)20+30*(12-6)=20+180=200
(20+30)*(12-6)=50*6=300
20+(30*12)-6=380-6=374
(20+30)*12-6=600-6=594