
下面各题怎样简便就怎样算72×58-32÷85 ...
下面各题怎样简便就怎样算72×58-32÷8518×25%+14×60+42×0.250.25×0.25×321116+813-(1116-513)...
下面各题怎样简便就怎样算72×58-32÷85 18×25%+14×60+42×0.25 0.25×0.25×32 1116+813-(1116-513)
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(1)
×
-
÷
,
=(
?
)×
,
=2×
,
=1.25;
(2)18×25%+
×60+42×0.25,
=(18+60+42)×0.25,
=120×0.25,
=30×(4×0.25),
=30×1,
=30;
(3)0.25×0.25×32,
=(0.25×4)×(0.25×4)×2,
=1×1×2,
=2;
(4)
+
-(
?
),
=(
?
)+(
+
),
=0+1,
=1.
7 |
2 |
5 |
8 |
3 |
2 |
8 |
5 |
=(
7 |
2 |
3 |
2 |
5 |
8 |
=2×
5 |
8 |
=1.25;
(2)18×25%+
1 |
4 |
=(18+60+42)×0.25,
=120×0.25,
=30×(4×0.25),
=30×1,
=30;
(3)0.25×0.25×32,
=(0.25×4)×(0.25×4)×2,
=1×1×2,
=2;
(4)
11 |
16 |
8 |
13 |
11 |
16 |
5 |
13 |
=(
11 |
16 |
11 |
16 |
8 |
13 |
5 |
13 |
=0+1,
=1.
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