题目内容
怎样简便就怎样计算.
(1)3618÷45-0.2
(2)4-
÷4-
(3)
×8×
×1.25
(4)2.9÷8+1.1×
.
(1)3618÷45-0.2
(2)4-
| 4 |
| 5 |
| 4 |
| 5 |
(3)
| 13 |
| 5 |
| 8 |
| 13 |
(4)2.9÷8+1.1×
| 1 |
| 8 |
(1)3618÷45-0.2,
=80.4-0.2,
=80.2;
(2)4-
÷4-
,
=4-
×
-
,
=4-
-
,
=4-(
+
),
=3;
(3)
×8×
×1.25,
=
×
×8×1.25,
=(
×
)×(8×1.25),
=
×10,
=16;
(4)2.9÷8+1.1×
,
=2.9×
+1.1×
,
=(2.9+1.1)×
,
=4×
,
=
.
=80.4-0.2,
=80.2;
(2)4-
| 4 |
| 5 |
| 4 |
| 5 |
=4-
| 4 |
| 5 |
| 1 |
| 4 |
| 4 |
| 5 |
=4-
| 1 |
| 5 |
| 4 |
| 5 |
=4-(
| 1 |
| 5 |
| 4 |
| 5 |
=3;
(3)
| 13 |
| 5 |
| 8 |
| 13 |
=
| 13 |
| 5 |
| 8 |
| 13 |
=(
| 13 |
| 5 |
| 8 |
| 13 |
=
| 8 |
| 5 |
=16;
(4)2.9÷8+1.1×
| 1 |
| 8 |
=2.9×
| 1 |
| 8 |
| 1 |
| 8 |
=(2.9+1.1)×
| 1 |
| 8 |
=4×
| 1 |
| 8 |
=
| 1 |
| 2 |
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