问题
解答题
用递等式计算. 848-800÷16×12 12.48-0.7×(5.12÷0.8)
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答案
(1)848-800÷16×12,
=848-50×12,
=848-600,
=248;
(2)12.48-0.7×(5.12÷0.8),
=12.48-0.7×6.4,
=12.48-4.48,
=8;
(3)
×[8 9
-(3 4
-7 16
)],1 4
=
×[8 9
-3 4
],3 16
=
×8 9
,9 16
=
.1 2