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神机妙算细又巧!(1)29÷827×215(2)(14+310)÷34(3)56×14+16÷4(4)1836÷[56×(47-14)](5)11×2+12×3+…+198×99+199×100.
题目详情
神机妙算细又巧!
(1)
÷
×
(2)(
+
)÷
(3)
×
+
÷4
(4)1836÷[56×(
-
)]
(5)
+
+…+
+
.
(1)
| 2 |
| 9 |
| 8 |
| 27 |
| 2 |
| 15 |
(2)(
| 1 |
| 4 |
| 3 |
| 10 |
| 3 |
| 4 |
(3)
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
(4)1836÷[56×(
| 4 |
| 7 |
| 1 |
| 4 |
(5)
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 98×99 |
| 1 |
| 99×100 |
▼优质解答
答案和解析
(1)
÷
×
,
=
×
×
,
=
;
(2)(
+
)÷
,
=
÷
+
÷
,
=
×
+
×
,
=
+
,
=
+
,
=
;
(3)
×
+
÷4,
=
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(4)1836÷[56×(
-
)],
=1836÷[56×
-56×
],
=1836÷[32-14],
=1836÷18,
=102;
(5)
+
+…+
+
,
=(
−
)+(
−
)+…+(
−
)+(
−
),
=1-
,
=
.
| 2 |
| 9 |
| 8 |
| 27 |
| 2 |
| 15 |
=
| 2 |
| 9 |
| 27 |
| 8 |
| 2 |
| 15 |
=
| 1 |
| 10 |
(2)(
| 1 |
| 4 |
| 3 |
| 10 |
| 3 |
| 4 |
=
| 1 |
| 4 |
| 3 |
| 4 |
| 3 |
| 10 |
| 3 |
| 4 |
=
| 1 |
| 4 |
| 4 |
| 3 |
| 3 |
| 10 |
| 4 |
| 3 |
=
| 1 |
| 3 |
| 2 |
| 5 |
=
| 5 |
| 15 |
| 6 |
| 15 |
=
| 11 |
| 15 |
(3)
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
=
| 5 |
| 6 |
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 4 |
=(
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 4 |
=1×
| 1 |
| 4 |
=
| 1 |
| 4 |
(4)1836÷[56×(
| 4 |
| 7 |
| 1 |
| 4 |
=1836÷[56×
| 4 |
| 7 |
| 1 |
| 4 |
=1836÷[32-14],
=1836÷18,
=102;
(5)
| 1 |
| 1×2 |
| 1 |
| 2×3 |
| 1 |
| 98×99 |
| 1 |
| 99×100 |
=(
| 1 |
| 1 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 98 |
| 1 |
| 99 |
| 1 |
| 99 |
| 1 |
| 100 |
=1-
| 1 |
| 100 |
=
| 99 |
| 100 |
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