题目内容
简便运算.
|
1.25×2.5×8 | 136-64-46 | 1.36+5.4+8.64+1.6. |
(1)
×
+
×
,
=(
+
)×
,
=1×
,
=
;
(2)1.25×2.5×8,
=(1.25×8)×2.5,
=10×2.5,
=25;
(3)136-64-46,
=136-(64+46),
=136-110,
=26;
(4)1.36+5.4+8.64+1.6,
=(1.36+8.64)+(5.4+1.6),
=10+7,
=17.
| 3 |
| 4 |
| 1 |
| 11 |
| 1 |
| 11 |
| 1 |
| 4 |
=(
| 3 |
| 4 |
| 1 |
| 4 |
| 1 |
| 11 |
=1×
| 1 |
| 11 |
=
| 1 |
| 11 |
(2)1.25×2.5×8,
=(1.25×8)×2.5,
=10×2.5,
=25;
(3)136-64-46,
=136-(64+46),
=136-110,
=26;
(4)1.36+5.4+8.64+1.6,
=(1.36+8.64)+(5.4+1.6),
=10+7,
=17.
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