题目内容

用递等式计算,能简算的要简算
4
17
+
1
25
)×17×25
8.1÷〔(4
1
7
-0.005×700)÷1
2
7
+3〕
1234÷1234
1234
1235
9999×2222+3334×3333.
(1)(
4
17
+
1
25
)×17×25,
=(
4
17
+
1
25
)×(17×25),
=(
4
17
×17×25)+(
1
25
×25×17),
=(4×25)+(1×17),
=100+17,
=117;

(2)8.1÷[(4
1
7
-0.005×700)÷1
2
7
+3],
=8.1÷[(4
1
7
-3.5)÷1
2
7
+3],
=8.1÷[
9
14
÷1
2
7
+3],
=8.1÷[
1
2
+3],
=8.1÷3
1
2

=
81
35


(3)1234÷1234
1234
1235

=1234÷
1234×1235+1234
1235

=1234÷
1234×(1235+1)
1235

=1234÷
1234×1236
1235

=1234×
1235
1234×1236

=
1235
1236


(4)9999×2222+3334×3333,
=3333×6666+3334×3333,
=3333×(6666+3334),
=3333×10000,
=33330000.
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