题目内容
| 1375-15×80 | 25-29.5÷(3.2+2.7) | 54.2-17.6+25.8-12.4 | ||||||||||||||||
48×(1-
|
| [
|
(1)1375-15×80,
=1375-1200,
=175;
(2)25-29.5÷(3.2+2.7),
=25-29.5÷5.9,
=25-5,
=20;
(3)54.2-17.6+25.8-12.4,
=(54.2+25.8)-(17.6+12.4),
=80-30,
=50;
(4)48×(1-
)+2,
=48×1-48×
+2,
=48-18+2,
=32;
(5)
×
+
÷7,
=
×
+
×
,
=(
+
)×
,
=
×
,
=
;
(6)[
-(
+
)]÷
,
=[
-
]÷
,
=
×
,
=
.
=1375-1200,
=175;
(2)25-29.5÷(3.2+2.7),
=25-29.5÷5.9,
=25-5,
=20;
(3)54.2-17.6+25.8-12.4,
=(54.2+25.8)-(17.6+12.4),
=80-30,
=50;
(4)48×(1-
| 3 |
| 8 |
=48×1-48×
| 3 |
| 8 |
=48-18+2,
=32;
(5)
| 16 |
| 27 |
| 1 |
| 7 |
| 5 |
| 27 |
=
| 16 |
| 27 |
| 1 |
| 7 |
| 5 |
| 27 |
| 1 |
| 7 |
=(
| 16 |
| 27 |
| 5 |
| 27 |
| 1 |
| 7 |
=
| 7 |
| 9 |
| 1 |
| 7 |
=
| 1 |
| 9 |
(6)[
| 15 |
| 16 |
| 3 |
| 8 |
| 1 |
| 4 |
| 15 |
| 32 |
=[
| 15 |
| 16 |
| 5 |
| 8 |
| 15 |
| 32 |
=
| 5 |
| 16 |
| 32 |
| 15 |
=
| 2 |
| 3 |
练习册系列答案
相关题目