怎样简便就怎样算: 0.25×3.2×125 28×0.
怎样简便就怎样算:0.25×3.2×12528×0.25+28×346.28-58-38+3.72(0.125+34+512)×24....
怎样简便就怎样算: 0.25×3.2×125 28×0.25+28×34 6.28-58-38+3.72 (0.125+34+512)×24.
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(1)0.25×3.2×125,
=0.25×0.4×8×125,
=(0.25×0.4)×(8×125),
=0.1×1000,
=100;
(2)28×0.25+28×
,
=28×(0.25+
),
=28×1,
=28;
(3)6.28-
-
+3.72,
=6.28+3.72-
-
,
=(6.28+3.72)-(
+
),
=10-1,
=9.
(4)(0.125+
+
)×24,
=0.125×24+
×24+
×24,
=3+18+10,
=31.
=0.25×0.4×8×125,
=(0.25×0.4)×(8×125),
=0.1×1000,
=100;
(2)28×0.25+28×
3 |
4 |
=28×(0.25+
3 |
4 |
=28×1,
=28;
(3)6.28-
5 |
8 |
3 |
8 |
=6.28+3.72-
5 |
8 |
3 |
8 |
=(6.28+3.72)-(
5 |
8 |
3 |
8 |
=10-1,
=9.
(4)(0.125+
3 |
4 |
5 |
12 |
=0.125×24+
3 |
4 |
5 |
12 |
=3+18+10,
=31.
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