题目内容
用你喜欢的方法计算.
136×
| 2001×3.14+200.1×31.4+20.01×314 | ||||||||
| 333×334+999×222 | ||||||||
| 1.25×17.6+36.1÷0.8+2.63×12.5 | 1
|
(1)136×
=(135+1)×
,
=135×
+1×
,
=2+
,
=2
;
(2)2001×3.14+200.1×31.4+20.01×314
=2001×3.14+2001×3.14+2001×3.14,
=2001×3.14×3,
=(2000+1)×9.42,
=2000×9.42+1×9.42,
=18840+9.42,
=18849.42;
(3)
-[(
+
)×
]
=
-[
×
],
=
-
,
=
;
(4)333×334+999×222
=333×334+333×(3×222),
=333×334+333×666,
=333×(334+666),
=333×1000,
=333000.
(5)1.25×17.6+36.1÷0.8+2.63×12.5
=1.25×17.6+36.1×1.25+26.3×1.25,
=(17.6+36.1+26.3)×1.25,
=80×1.25,
=100;
(6)1
÷(
+2.5×
)
=1
÷(
+2),
=
÷
,
=
.
| 2 |
| 135 |
=(135+1)×
| 2 |
| 135 |
=135×
| 2 |
| 135 |
| 2 |
| 135 |
=2+
| 2 |
| 135 |
=2
| 2 |
| 135 |
(2)2001×3.14+200.1×31.4+20.01×314
=2001×3.14+2001×3.14+2001×3.14,
=2001×3.14×3,
=(2000+1)×9.42,
=2000×9.42+1×9.42,
=18840+9.42,
=18849.42;
(3)
| 5 |
| 8 |
| 1 |
| 2 |
| 3 |
| 5 |
| 5 |
| 11 |
=
| 5 |
| 8 |
| 11 |
| 10 |
| 5 |
| 11 |
=
| 5 |
| 8 |
| 1 |
| 2 |
=
| 1 |
| 8 |
(4)333×334+999×222
=333×334+333×(3×222),
=333×334+333×666,
=333×(334+666),
=333×1000,
=333000.
(5)1.25×17.6+36.1÷0.8+2.63×12.5
=1.25×17.6+36.1×1.25+26.3×1.25,
=(17.6+36.1+26.3)×1.25,
=80×1.25,
=100;
(6)1
| 1 |
| 8 |
| 1 |
| 4 |
| 4 |
| 5 |
=1
| 1 |
| 8 |
| 1 |
| 4 |
=
| 9 |
| 8 |
| 9 |
| 4 |
=
| 1 |
| 2 |
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