直接寫(xiě)得數(shù).
5
12
×3=
4
5
×0×15=
0.6÷
3
5
=
2-
1
6
-
5
6
=
(2+
3
8
)÷2
3
8
=
1
3
×
1
4
×
3
5
=
1
10
+
1
5
)×5=
1
3
-
1
4
)×12=
分析:(1)根據(jù)分?jǐn)?shù)乘法的計(jì)算方法計(jì)算,
(2)0乘任何數(shù)得0,
(3)先把小數(shù)化成分?jǐn)?shù),再根據(jù)分?jǐn)?shù)乘法的計(jì)算方法計(jì)算,
(4)根據(jù)減法的性質(zhì)進(jìn)行計(jì)算,
(5)先算括號(hào)里面的,再算除法,
(6)根據(jù)乘法結(jié)合律計(jì)算,
(7)(8)根據(jù)乘法分配律計(jì)算,
解答:
解:(1)
5
12
×3=
5
4
(2)
4
5
×0×15=0
(3)0.6÷
3
5
=1
(4)2-
1
6
-
5
6
=1
(5)(2+
3
8
)÷2
3
8
=1
(6)
1
3
×
1
4
×
3
5
=
1
20
(7)(
1
10
+
1
5
)×5=1
1
2
(8)(
1
3
-
1
4
)×12=1
點(diǎn)評(píng):本題綜合考查了學(xué)生的分?jǐn)?shù)計(jì)算的能力,注意要細(xì)心.
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