用三种方法计算“71又15/16*（-8）

. 15
71------- × (-8)
16
. 15
=71×(-8) + ------- ×(-8)
16

=-568 - 7.5
=- 575.5

. 15
71------- × (-8)
16

. 71×16+15
=------------------- × (-8)
16
. 71×16+15
=- ------------------
2
.
= - 71×8 - 7.5
= -568 - 7.5
=- 575.5追答

. 15
71------- × (-8)
16

. 71×16+15
=------------------- × (-8)
16
. 71×16+15
=- ------------------
2

. 1151
= - -------------
2
=- 575.5

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