大家帮我想想这道数学题
1.按运算结果的要求,填上运算符号和括号(两种)(1)1/2()0.4()3/10()1/5()0.1=()(2)1/2()0.4()3/10()1/5()0.1=()2...
1.按运算结果的要求,填上运算符号和括号(两种)
(1)1/2()0.4()3/10()1/5()0.1=()
(2)1/2()0.4()3/10()1/5()0.1=()
2.在5个0.3中间加上怎样的运算符号和括号,就能使等号两边相等?
(1)0.3()0.3()0.3()0.3()0.3=
(2)0.3()0.3()0.3()0.3()0.3=
(3)0.3()0.3()0.3()0.3()0.3=
(4)0.3()0.3()0.3()0.3()0.3=
上面打错应该是
1.按运算结果的要求,填上运算符号和括号(两种)
(1)1/2()0.4()3/10()1/5()0.1=1
(2)1/2()0.4()3/10()1/5()0.1=10
2.在5个0.3中间加上怎样的运算符号和括号,就能使等号两边相等?
(1)0.3()0.3()0.3()0.3()0.3=0
(2)0.3()0.3()0.3()0.3()0.3=1
(3)0.3()0.3()0.3()0.3()0.3=2
(4)0.3()0.3()0.3()0.3()0.3=4 展开
(1)1/2()0.4()3/10()1/5()0.1=()
(2)1/2()0.4()3/10()1/5()0.1=()
2.在5个0.3中间加上怎样的运算符号和括号,就能使等号两边相等?
(1)0.3()0.3()0.3()0.3()0.3=
(2)0.3()0.3()0.3()0.3()0.3=
(3)0.3()0.3()0.3()0.3()0.3=
(4)0.3()0.3()0.3()0.3()0.3=
上面打错应该是
1.按运算结果的要求,填上运算符号和括号(两种)
(1)1/2()0.4()3/10()1/5()0.1=1
(2)1/2()0.4()3/10()1/5()0.1=10
2.在5个0.3中间加上怎样的运算符号和括号,就能使等号两边相等?
(1)0.3()0.3()0.3()0.3()0.3=0
(2)0.3()0.3()0.3()0.3()0.3=1
(3)0.3()0.3()0.3()0.3()0.3=2
(4)0.3()0.3()0.3()0.3()0.3=4 展开
2个回答
展开全部
1.按运算结果的要求,填上运算符号和括号(两种)
(1)1/2×0.4×(3/10+1/5)÷0.1=1
(2)1/2+(0.4×3/10÷1/5)-0.1=1
(3)1/2÷(0.4-3/10)×1/5÷0.1=10
(4)1/2÷(0.4+3/10-1/5)÷0.1=10
2.在5个0.3中间加上怎样的运算符号和括号,就能使等号两边相等?
(1)0.3×0.3×(0.3-0.3)×0.3=0
(2)0.3÷0.3+(0.3-0.3)×0.3=1
(3)0.3-0.3+(0.3+0.3)÷0.3=2
(4)(0.3+0.3+0.3+0.3)÷0.3=4
最后一个只想到这一个办法。
(1)1/2×0.4×(3/10+1/5)÷0.1=1
(2)1/2+(0.4×3/10÷1/5)-0.1=1
(3)1/2÷(0.4-3/10)×1/5÷0.1=10
(4)1/2÷(0.4+3/10-1/5)÷0.1=10
2.在5个0.3中间加上怎样的运算符号和括号,就能使等号两边相等?
(1)0.3×0.3×(0.3-0.3)×0.3=0
(2)0.3÷0.3+(0.3-0.3)×0.3=1
(3)0.3-0.3+(0.3+0.3)÷0.3=2
(4)(0.3+0.3+0.3+0.3)÷0.3=4
最后一个只想到这一个办法。
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