3又5/8-(-5/6)÷(-7/24)
=29/8-5/6x24/7
=29/8-20/7
=203/56-160/56
=43/56
(-81)÷2又1/4×4/9×(-1/16)
=81x4/9x4/9x1/16
=16x1/16
=1
-5÷(-0.2)×(-2/7)+|-1/7|
=-5÷0.2x2/7+1/7
=-25x2/7+1/7
=-50/7+1/7
=-49/7
=-7
3又5/8-(-5/6)÷(-7/24)
=29/8-5/6x24/7
=203/56-160/56
=43/56
(-81)÷2又1/4×4/9×(-1/16)
=81x4/9x4/9x1/16
=1
-5÷(-0.2)×(-2/7)+|-1/7|
=-5÷0.2x2/7+1/7
=-25x2/7+1/7
=-49/7
=-7
2.
原式=(-81)÷9/4×4/9×(-1/16)
=81×4/9×4/9×1/16
=81×16/81×1/16
=1