问题
解答题
简算. 23-
|
答案
(1)23-
-12 17
,5 17
=23-(
+12 17
),5 17
=23-1,
=22;
(2)1.8×
+2.2×25%,1 4
=1.8×0.25+2.2×0.25,
=0.25×(1.8+2.2),
=0.25×4,
=1;
(3)44×(
-5 11
),1 4
=44×
-44×5 11
,1 4
=20-11,
=9.
简算. 23-
|
(1)23-
-12 17
,5 17
=23-(
+12 17
),5 17
=23-1,
=22;
(2)1.8×
+2.2×25%,1 4
=1.8×0.25+2.2×0.25,
=0.25×(1.8+2.2),
=0.25×4,
=1;
(3)44×(
-5 11
),1 4
=44×
-44×5 11
,1 4
=20-11,
=9.