计算:(1)(-5)+12(2)22+(-4)-(-2)+4(3)?23+(+57)+(?13)+247(4)100÷(?8)×(?18)(5)23×1
计算:(1)(-5)+12(2)22+(-4)-(-2)+4(3)?23+(+57)+(?13)+247(4)100÷(?8)×(?18)(5)23×18?13×23+2...
计算:(1)(-5)+12(2)22+(-4)-(-2)+4(3)?23+(+57)+(?13)+247(4)100÷(?8)×(?18)(5)23×18?13×23+23×4(6)?14÷(?52)×(?53)+|0.8?1|
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(1)(-5)+12=-5+12=7;
(2)22+(-4)-(-2)+4=22-4+2+4=24;
(3)?
+(+
)+(?
)+2
=-
?
+
+
=-1+
=
;
(4)100÷(?8)×(?
)=100×
×
=
;
(5)
×18?13×
+
×4=
×(18-13+4)=6;
(6)?14÷(?52)×(?
)+|0.8?1|=-1×(?
)×(?
)+
=-
+
=
.
(2)22+(-4)-(-2)+4=22-4+2+4=24;
(3)?
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(4)100÷(?8)×(?
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(5)
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(6)?14÷(?52)×(?
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