18×35-0.125×0.5 3.2+(9.2-3.8)÷12 17.6-8.2-2.8 19+18÷34+89 (13+0.2)×78÷(3-0.5) 97×9598
①
=0.125×0.6-0.125×0.5,
=0.125×(0.6-0.5),
=0.125×0.1,
=0.0125;
②3.2+(9.2-3.8)÷
,
=3.2+5.4×2,
=3.2+10.8,
=14;
③17.6-8.2-2.8,
=17.6-(8.2+2.8),
=17.6-11,
=6.6;
④
+
÷
+
,
=
+
×
+
,改扰
=(
+
)+
,
=1+
,
=1
;
⑤(
+0.2)×
÷(3-0.5),
=(
+
)×
÷2.5,
=
×
×
,
=
;
⑥则让97×
,孙歼局
=(98-1)×
,
=98×
-
,
=95-
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