题目内容
| 计算题 18.4-2.7+1.6-0.3 | (
|
| ||||||||||||||
| 4.28×7.75+0.428×22.5 | (
| 3.6÷[0.6×(0.8+0.7)]. |
(1)18.4-2.7+1.6-0.3,
=(18.4+1.6)-(2.7+0.3),
=20-3,
=17;
(2)4.28×7.75+0.428×22.5,
=0.428×77.5+0.428×22.5,
=0.428×(77.5+22.5),
=0.428×100,
=42.8;
(3)(
+
-
)×42,
=
×42+
×42-
×42,
=24+8-14,
=18;
(4)(
+
)÷
+
,
=
×
+
,
=
+
,
=2;
(5)
-
÷
×
,
=
-
×
×
,
=
-
,
=
;
(6)3.6÷[0.6×(0.8+0.7)],
=3.6÷[0.6×1.5],
=3.6÷0.9,
=4.
=(18.4+1.6)-(2.7+0.3),
=20-3,
=17;
(2)4.28×7.75+0.428×22.5,
=0.428×77.5+0.428×22.5,
=0.428×(77.5+22.5),
=0.428×100,
=42.8;
(3)(
| 4 |
| 7 |
| 4 |
| 21 |
| 1 |
| 3 |
=
| 4 |
| 7 |
| 4 |
| 21 |
| 1 |
| 3 |
=24+8-14,
=18;
(4)(
| 1 |
| 6 |
| 7 |
| 15 |
| 2 |
| 5 |
| 5 |
| 12 |
=
| 19 |
| 30 |
| 5 |
| 2 |
| 5 |
| 12 |
=
| 19 |
| 12 |
| 5 |
| 12 |
=2;
(5)
| 1 |
| 6 |
| 3 |
| 8 |
| 7 |
| 4 |
| 7 |
| 12 |
=
| 1 |
| 6 |
| 3 |
| 8 |
| 4 |
| 7 |
| 7 |
| 12 |
=
| 1 |
| 6 |
| 1 |
| 8 |
=
| 1 |
| 24 |
(6)3.6÷[0.6×(0.8+0.7)],
=3.6÷[0.6×1.5],
=3.6÷0.9,
=4.
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