一道有理数的除法.财富100!0.8×2/11+4.8×(—2\7)—2.2÷3\7+2.2÷3\7+0.8×9\11

一道有理数的除法.财富100!0.8×2/11+4.8×(—2\7)—2.2÷3\7+2.2÷3\7+0.8×9\11
一道有理数的除法.财富100!
0.8×2/11+4.8×(—2\7)—2.2÷3\7+2.2÷3\7+0.8×9\11

一道有理数的除法.财富100!0.8×2/11+4.8×(—2\7)—2.2÷3\7+2.2÷3\7+0.8×9\11
0.8×2/11+4.8×(—2\7)—2.2÷3\7+2.2÷3\7+0.8×9\11
=[0.8×2/11+0.8×6×(-2/7)+0.8×9/11]-2.2÷3/7+2.2÷3/7
=0.8×(2/11-12/7+9/11)-0
=0.8×(1-12/7)
=0.8×(-5/7)
=-4/7

=0.8×(2/11+9/11)+4.8×(-3/7)-2.2×3/7
=0.8-3/7×(4.8+2.2)
=0.8-3
=-2.2

0.8×2/11+4.8×(—2\7)—2.2÷3\7+2.2÷3\7+0.8×9\11
=0.8×2/11+0.8×9/11-4.8×2/7
=0.8×(2/11+9/11)-4.8×2/7
=0.8-9.6/7
=5.6/7-9.6/7
=-4/7

-4/7

=0.8x（2/11+9/11）-4.8x2/7
=0.8-48/10x2/7
=0.8-48/35
=28/35-48/35
=-20/35
=-4/7

=4／5×2／11－24／5×2／7＋4／5×9／11
=4／5×﹙2／11+9／11﹚ 合并同类项
=﹣20／35