挑战习题
1/5单选题
难度:

1.

将方程变形为,甲、乙、丙、丁四名同学都认为是错误的,对于错误的原因,四名同学给出了各自的解释,其中正确的是( )


A

甲:移项时,没有改变符号

B

乙:不应该将公子分母同时扩大10倍

C

丙:去括号时,括号外面是负号,括号里面的项未变号

D

丁:5不应该变为50

提示1:
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提示2:
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
提示3:
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正确答案:RA==
PGRpdj7op6PvvJrmlrnnqIs8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvM0UvckJBQ0ZGTUY5YV9nTW9mbUFBQUNqVm9IRFJnNTIyLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9GMC8zRS9yQkFDRkZNRjlhX2dNb2ZtQUFBQ2pWb0hEUmc1MjIucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iMTEzIj7nmoTlt6bovrnnmoTmr4/kuIDpobnnmoTliIblrZDjgIHliIbmr43kuZjku6UxMOW+l++8mjxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8xMi9GRC9yQkFDRTFNRjlhX3pRWmJfQUFBQ2xrWUxkSXc4OTAucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzEyL0ZEL3JCQUNFMU1GOWFfelFaYl9BQUFDbGtZTGRJdzg5MC5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSIxMjIiPjxicj7ov5vkuIDmraXlj5jlvaLkuLo6PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0YwLzNFL3JCQUNGRk1GOWFfajdZMTJBQUFDekVlQnp0TTI5NC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRjAvM0UvckJBQ0ZGTUY5YV9qN1kxMkFBQUN6RWVCenRNMjk0LnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjE0MiI+PGJyPuenu+mhueW+l++8mjxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8xMi9GRC9yQkFDRTFNRjlhLXp3VDdZQUFBQ3dUZzg2b0ExMjkucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzEyL0ZEL3JCQUNFMU1GOWEtendUN1lBQUFDd1RnODZvQTEyOS5wbmciIGhlaWdodD0iNDIiIHdpZHRoPSIxNDIiPu+8jDxicj7mlYVB44CBQuOAgUPplJnor6/vvIxE5q2j56Gu77yMPGJyPuaVhemAiUQuPC9kaXY+