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回答:17÷51+(1/68+2/51)×17 =1/3+1×17/68+2×17/51 =1/3+1/4+2/3 =1/3+2/3+1/4 =5/4
17/51+(17/65+34/51)拿走括号就等于1+17/68
17÷51+(1/68+2/51)×17 =17/51+34/51+17/68 =51/51+1/4 =5/4 4+5=9千米 3/4÷9X8=2/3小时
17除51+(68分之1+51分之2)乘17 =17×1/51+17×1/68+17×2/51 =17×(1/51+2/51)+1/4 =17×1/17+1/4 =1+1/4 =1又1/4
17/51+(1/68+2/51)*17 =17*(1/51+1/68+2/51) =17*(3/51+1/68) =17*(1/17+1/68) =1+1/4 =5/4
第一个后面应该是x号吧 第一个19.75-(1.75×8/13+1又3/4x5/13)=19.75-(7/4x8/13+7/4x5/13)=19.75-7/4(8/13+5/13)=19.75-1.75=18 第二个17÷51+(1/68+2/51)×17 =17/51+1/68x17+2/51x17 =17/51+34/51+17/68 =1+1/4=5/4 第三个76×(1/23-1/53)+...
=8.07×87+8.07×13 =8.07×(87+13)=8.07×100 =807 【用到乘法分配律】17÷51+(68分之1+51分之二)×17 =17/51 + 1/68 ×17 + 2/51×17 =17/51 +17/68 +34/51 =17/51 +34/51 +17/68 =1 +1/4 =5/4 (即1.25)【乘法分配律 合并同类项】76...
对于这种题目,首先要将分数转化为同分母分数,也就是要找68和51的公倍数,而我们为了得到最简结果,一般都会找他们的最小公倍数,将68和51分解质因数得68=2*2*17,51=3*17,他们的最小公倍数是2*2*3*17=204,最后1/68+2/51=3/204+8/204=11/204,结果已经是最简分数,因此最后的得数...
答:17和51的最大公因数是(17),最小公倍数是(51)。