Question

有理数混合运算题目，求计算过程和结果，麻烦大家了!

RT 谢谢了

Answer 1

逐步计算则可：

原式

=-12×（-8/48+1/48）-(17×16+7)/16×1/9

=12×7/48-279/144

=7/4-31/16

=28/16-31/16

=-3/16

Answer 2

-12×(-1/6+1/48)-17又7/16÷(-3)^2
=-12×(-1/6)-12×1/48-279/16÷9
=2-1/4-31/16
=32/16-4/16-31/16
=-3/16