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精简巧算:(56+38)×48=14÷25=5978÷177=817÷23+123×917=
题目详情
精简巧算:
(
+
)×48=
÷25=
÷
=
÷23+
×
=
(
5 |
6 |
3 |
8 |
1 |
4 |
59 |
78 |
1 |
77 |
8 |
17 |
1 |
23 |
9 |
17 |
▼优质解答
答案和解析
(1)(
+
)×48,
=
×48+
×48,
=40+18,
=58;
(2)
÷25,
=
×
,
=
;
(3)
÷
,
=
×77,
=
×(78−1),
=
×78−
×1,
=59−
,
=58
;
(4)
÷23+
×
,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
.
5 |
6 |
3 |
8 |
=
5 |
6 |
3 |
8 |
=40+18,
=58;
(2)
1 |
4 |
=
1 |
4 |
1 |
25 |
=
1 |
100 |
(3)
59 |
78 |
1 |
77 |
=
59 |
78 |
=
59 |
78 |
=
59 |
78 |
59 |
78 |
=59−
59 |
78 |
=58
19 |
78 |
(4)
8 |
17 |
1 |
23 |
9 |
17 |
=
8 |
17 |
1 |
23 |
1 |
23 |
9 |
17 |
=(
8 |
17 |
9 |
17 |
1 |
23 |
=1×
1 |
23 |
=
1 |
23 |
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