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)-
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)...
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)2635+935?1135 (8)1100+99100?79.
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(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)
+
?
,
=1-
,
=
;
(8)
+
?
,
=1-
,
=
.
=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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