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计算:
98-90×12÷14
=98-90×12/14
=98-90×6/7
=98×7/7-90×6/7
=686/7-540/7
=(686-540)/7
=146/7
98-90×12÷14
=98-90×12/14
=98-90×6/7
=98×7/7-90×6/7
=686/7-540/7
=(686-540)/7
=146/7
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展开全部
98-90x12÷14
=98-90x6÷7
=(90x7+8x7-90x6)/7
=(90+56)/7
=146/7
=20又6/7
=98-90x6÷7
=(90x7+8x7-90x6)/7
=(90+56)/7
=146/7
=20又6/7
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