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简算下面个题 32.48-12.5-7.5 64×1563 2998×9 511×34+611÷43.

编辑:chaxungu时间:2026-04-27 12:34:30分类:小学数学题库

简算下面个题
32.48-12.5-7.564×
15
63
2998×9
5
11
×
3
4
+
6
11
÷
4
3
(1)32.48-12.5-7.5
=32.48-(12.5+7.5),
=32.48-20,
=12.48;

(2)64×
15
63

=(63+1)×
15
63

=63×
15
63
+
15
63

=15+
15
63

=15
15
63


(3)2998×9
=×9,
=3000×9-2×9,
=27000-18,
=26982;

(4)
5
11
×
3
4
+
6
11
÷
4
3

=
5
11
×
3
4
+
6
11
×
3
4

=(
5
11
+
6
11
)×
3
4

=1×
3
4

=
3
4