① 7 ×(-1+3/14)

问题描述:

① 7 ×(-1+3/14)
②(-11/4)-(-121/4)+(+5/3)-(-3/14)- 29/4 +(-16/3)

① 7 ×(-1+3/14)
=7×(-1)+7×(3/14)
=-7+3/2
=-11/2;
②(-11/4)-(-121/4)+(+5/3)-(-3/14)- 29/4 +(-16/3)
=-11/4+121/4+5/3+3/14-29/4-16/3
=-40/4+121/4-11/3+3/14
=81/4-11/3+3/14
=243/12-44/12+3/14
=199/12+3/14
=1393/84+18/84
=1411/84;
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