发布网友 发布时间:2024-10-17 18:06
共1个回答
热心网友 时间:2024-10-26 02:45
①80÷(1-84%),
=80÷0.16,
=500;
②5-5× 2 5 + 3 5 ,
=5-2+ 3 5 ,
=3 3 5 ;
③0.25×32×12.5%,
=0.25×4×8×0.125,
=(0.25×4)×(8×0.125),
=1×1,
=1;
④ 7 9 ÷ 11 5 + 2 9 × 5 11 ,
= 7 9 × 5 11 + 2 9 × 5 11 ,
=( 7 9 + 2 9 )× 5 11 ,
=1× 5 11 ,
= 5 11 .