计算:(1+0.23+0.34)*(0.2903+0.34+0.56)-(1+0.23+0.34+0.56)*(0.23
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计算:(1+0.23+0.34)*(0.2903+0.34+0.56)-(1+0.23+0.34+0.56)*(0.23+0.34
令0.23+0.34+0.56=a
则1+0.23+0.34=1+a-0.56
0.23+0.34+0.56=a
1+0.23+0.34+0.56=1+a
0.23+0.34=a-0.56
所以原式=a(1+a-0.56)-(1+a)(a-0.56)
=a*1+a(a-0.56)-1*(a-0.56)-a(a-0.56)
=a-(a-0.56)
=a-a+0.56
=0.56
则1+0.23+0.34=1+a-0.56
0.23+0.34+0.56=a
1+0.23+0.34+0.56=1+a
0.23+0.34=a-0.56
所以原式=a(1+a-0.56)-(1+a)(a-0.56)
=a*1+a(a-0.56)-1*(a-0.56)-a(a-0.56)
=a-(a-0.56)
=a-a+0.56
=0.56
计算:(1+0.23+0.34)*(0.2903+0.34+0.56)-(1+0.23+0.34+0.56)*(0.23
简便计算:(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23
简便计算(1+023+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0
计算.要简便 (1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)*(0.
计算:0.12(2)+0.23(3)+0.34(4)+0.45(5)+0.56(6)+0.67(7)+0.78(8)+0
循环小数计算0.12(12循环)+0.23(23循环)+0.34(34循环)+0.45(45循环)+0.56(56循环)
计算:(1)log2748
计算(1)18
计算:(1)0.5
计算:(1)(259)
计算解题({【1】})
(1)计算:(