题目内容
脱式计算,能简算的要简算。
(1)
+3.52+
+5.48
(2)
-0.4+
-
(3)1-[1-(
-
÷
)]÷
(1)
(2)
(3)1-[1-(
(1)
+3.52+
+5.48
=
+
+(3.52+5.48)
=10+9
=19
(2)
-0.4+
-
=
+
-(0.4+
)
=1-1
=0
(3)1-[1-(
-
÷
)]÷
=1-[1-(
-
)]÷
=1-
÷
=0
=
=10+9
=19
(2)
=
=1-1
=0
(3)1-[1-(
=1-[1-(
=1-
=0
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