42x78+78x56十78x2
42x78+78x56十78x2
=(42+56+2)x78
=100x78
=7800
=(42+56+2)x78
=100x78
=7800
温馨提示：答案为网友推荐，仅供参考
第1个回答 2017-12-24
<p><img>91529822720e0cf3f4ed69030146f21fbe09aa2b<\/img></p><p>
参考</p>追答
参考</p>追答
第2个回答 2017-12-24
42x78+78x56十78x2
=(42+56十2)x78
=78x100
=7800
=(42+56十2)x78
=78x100
=7800
