递等式计算.(能简便的要简算)(1)3÷13+23÷3(2)5.4-(0.4+12×0.25)(3)47?5.89+1037?4.11(4)
递等式计算.(能简便的要简算)(1)3÷13+23÷3(2)5.4-(0.4+12×0.25)(3)47?5.89+1037?4.11(4)18×112+1.5×0.87...
递等式计算.(能简便的要简算)(1)3÷13+23÷3(2)5.4-(0.4+12×0.25)(3)47?5.89+1037?4.11(4)18×112+1.5×0.875+112(5)(123?58)÷(712×12)(6)814÷[1.25+(56?14)×12].
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2014-10-16
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(1)3÷
+÷3,
=9+
,
=9
;
(2)5.4-(0.4+12×0.25),
=5.4-(0.4+3),
=5.4-3.4,
=2;
(3)
?5.89+10?4.11,
=(
+10
)-(5.89+4.11),
=11-10,
=1;
(4)
×1+1.5×0.875+1,
=1
×(
+0.875+1),
=1
×2,
=3;
(5)
(1?)÷(×),
=1
÷,
=3
;
(6)
8÷[1.25+(?)×12],
=8
÷[1.25+
×12],
=8
÷[1.25+7],
=8
÷8.25,
=1.
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