题目内容
用简便方法计算
(1)22×
+22×
(2)1+44×17÷11÷34
(3)(
-
)÷
×5
(4)2012÷2012
.
(1)22×
| 55 |
| 56 |
| 1 |
| 56 |
(2)1+44×17÷11÷34
(3)(
| 5 |
| 7 |
| 2 |
| 3 |
| 5 |
| 21 |
(4)2012÷2012
| 2012 |
| 2013 |
(1)22×
+22×
,
=22
+
,
=22×1,
=22;
(2)1+44×17÷11÷34,
=1+44×17×
×
,
=1+2,
=3;
(3)(
-
)÷
×5,
=(
-
)×
×5,
=
×21-
×21,
=15-14,
=1;
(4)2012÷2012
.
=2012÷
,
=2012÷
,
=2012×
,
=
,
=
.
| 55 |
| 56 |
| 1 |
| 56 |
=22
| 55 |
| 56 |
| 1 |
| 56 |
=22×1,
=22;
(2)1+44×17÷11÷34,
=1+44×17×
| 1 |
| 11 |
| 1 |
| 34 |
=1+2,
=3;
(3)(
| 5 |
| 7 |
| 2 |
| 3 |
| 5 |
| 21 |
=(
| 5 |
| 7 |
| 2 |
| 3 |
| 21 |
| 5 |
=
| 5 |
| 7 |
| 2 |
| 3 |
=15-14,
=1;
(4)2012÷2012
| 2012 |
| 2013 |
=2012÷
| 2012×2013+2012 |
| 2013 |
=2012÷
| 2012×(2013+1) |
| 2013 |
=2012×
| 2013 |
| 2012×(2013+1) |
=
| 2013 |
| 2013+1 |
=
| 2013 |
| 2014 |
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