问道有理数算术题-1²-【1又3/7+(-12)÷6】²×(-7/4)

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问道有理数算术题-1²-【1又3/7+(-12)÷6】²×(-7/4)问道有理数算术题-1²-【1又3/7+(-12)÷6】²×(-7/4)问道有理数算术题-1

问道有理数算术题-1²-【1又3/7+(-12)÷6】²×(-7/4)
问道有理数算术题
-1²-【1又3/7+(-12)÷6】²×(-7/4)

问道有理数算术题-1²-【1又3/7+(-12)÷6】²×(-7/4)
-1²-【1又3/7+(-12)÷6】²×(-7/4)
=-1²-[10/7+(-2)]²×(-7/4)
=-1²-[- 4/7]²×(-7/4)
=-1²-16/49×(-7/4)
=-1²+4/7
=-1+4/7
=-3/7

1又7分之4

-7/5