问题
解答题
简便运算
|
答案
0.65-
+6.35-1 4
.3 4
=0.65+6.35-(
+1 4
),3 4
=7-1,
=6;
×2 9
+0.25+1 4
×25%,7 9
=(
+2 9
+1)×0.25,7 9
=2×0.25,
=0.5.
简便运算
|
0.65-
+6.35-1 4
.3 4
=0.65+6.35-(
+1 4
),3 4
=7-1,
=6;
×2 9
+0.25+1 4
×25%,7 9
=(
+2 9
+1)×0.25,7 9
=2×0.25,
=0.5.