列式计算.(1)一个数加上它的25%正好等于60的23,这个数是多少?(2)65与23的和除以它们的差,得到的商再乘514积是多少?
(1)60×
÷(1+25%)
=40÷125%,
=32.
答:这个数是32;
(2)(
+
)÷(
-
)×
,
=
÷
×
,
=
×
×
,
=
.
答:积是
.
2 |
3 |
=40÷125%,
=32.
答:这个数是32;
(2)(
6 |
5 |
2 |
3 |
6 |
5 |
2 |
3 |
5 |
14 |
=
28 |
15 |
8 |
15 |
5 |
14 |
=
28 |
15 |
15 |
8 |
5 |
14 |
=
5 |
4 |
答:积是
5 |
4 |
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