题目内容
| 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)
| (8)
|
(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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