问题 解答题
递等式计算(能巧算的要巧算).
(1)412÷(607-36×14)
(2)72×36+18×36
(3)80×[(325+7)-304](4)250×8-10000÷8
(5)125×6×8(6)444×25
(7)
26
35
+
9
35
-
11
35
(8)
1
100
+
99
100
-
7
9
答案

(1)412÷(607-36×14),

=412÷(607-504),

=412÷103,

=4;

(2)72×36+18×36,

=(72+18)×36,

=90×36,

=3240;

(3)80×[(325+7)-304],

=80×[332-304],

=80×28,

=2240;

(4)250×8-10000÷8,

=2000-1250,

=750;

(5)125×6×8,

=125×8×6,

=1000×6,

=6000;

(6)444×25,

=111×(4×25),

=111×100,

=11100;

(7)

26
35
+
9
35
-
11
35

=1-

11
35

=

24
35

(8)

1
100
+
99
100
-
7
9

=1-

7
9

=

2
7

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