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用简便方法计算.(1)4.2×0.36+4.2×64%(2)33.6÷8+33.6÷87(3)512+1321+712+821(4)511×[(52+13)÷56].
题目详情
用简便方法计算.
(1)4.2×0.36+4.2×64%
(2)33.6÷8+33.6÷
(3)
+
+
+
(4)
×[(
+
)÷
].用简便方法计算.
(1)4.2×0.36+4.2×64%
(2)33.6÷8+33.6÷
(3)
+
+
+
(4)
×[(
+
)÷
].
(3)
+
+
+
(4)
×[(
+
)÷
].
8 7 8 8 7 7
+
+
+
(4)
×[(
+
)÷
].
5 12 5 5 12 12
+
+
(4)
×[(
+
)÷
].
13 21 13 13 21 21
+
(4)
×[(
+
)÷
].
7 12 7 7 12 12
(4)
×[(
+
)÷
].
8 21 8 8 21 21
×[(
+
)÷
].
5 11 5 5 11 11
+
)÷
].
5 2 5 5 2 2
)÷
].
1 3 1 1 3 3
].
5 6 5 5 6 6
(1)4.2×0.36+4.2×64%
(2)33.6÷8+33.6÷
8 |
7 |
(3)
5 |
12 |
13 |
21 |
7 |
12 |
8 |
21 |
(4)
5 |
11 |
5 |
2 |
1 |
3 |
5 |
6 |
(1)4.2×0.36+4.2×64%
(2)33.6÷8+33.6÷
8 |
7 |
(3)
5 |
12 |
13 |
21 |
7 |
12 |
8 |
21 |
(4)
5 |
11 |
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2 |
1 |
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(3)
5 |
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21 |
7 |
12 |
8 |
21 |
(4)
5 |
11 |
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2 |
1 |
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7 |
5 |
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21 |
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8 |
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(4)
5 |
11 |
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2 |
1 |
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5 |
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5 |
12 |
13 |
21 |
7 |
12 |
8 |
21 |
(4)
5 |
11 |
5 |
2 |
1 |
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13 |
21 |
7 |
12 |
8 |
21 |
(4)
5 |
11 |
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2 |
1 |
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12 |
8 |
21 |
(4)
5 |
11 |
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2 |
1 |
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8 |
21 |
5 |
11 |
5 |
2 |
1 |
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▼优质解答
答案和解析
(1)4.2×0.36+4.2×64% =4.2×0.36+4.2×0.64=4.2×(0.36+0.64)=4.2×1=4.2 (2)33.6÷8+33.6÷87=33.6×18+33.6×78=33.6×(18+78)=33.6×1=33.6(3)512+1321+712+821 =(512+712)+(1321+...
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