题目内容
计算(能简算的要简算,写出计算过程)
(1)
÷
-
×
(2)[4
-(3
-2
)×
]÷
(3)12
÷6
×[2
+(24.4-24
)]
(4)2+4
+6
+8
+10
+12
(5)12345678912-1234567890×1234567892
(6)
+
+
+
+…+
.
(1)
| 5 |
| 3 |
| 4 |
| 5 |
| 5 |
| 4 |
| 2 |
| 3 |
(2)[4
| 4 |
| 7 |
| 4 |
| 5 |
| 2 |
| 3 |
| 15 |
| 7 |
| 14 |
| 15 |
(3)12
| 9 |
| 22 |
| 1 |
| 2 |
| 4 |
| 7 |
| 8 |
| 45 |
(4)2+4
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
(5)12345678912-1234567890×1234567892
(6)
| 1 |
| 3 |
| 1 |
| 15 |
| 1 |
| 35 |
| 1 |
| 63 |
| 1 |
| 399 |
(1)
| 5 |
| 3 |
| 4 |
| 5 |
| 5 |
| 4 |
| 2 |
| 3 |
=
|
=(
|
| 5 |
| 4 |
=1×
| 5 |
| 4 |
=
| 5 |
| 4 |
(2)[4
| 4 |
| 7 |
| 4 |
| 5 |
| 2 |
| 3 |
| 15 |
| 7 |
| 14 |
| 15 |
=[4
| 4 |
| 7 |
| 19 |
| 5 |
| 8 |
| 3 |
| 15 |
| 7 |
| 14 |
| 15 |
=[4
| 4 |
| 7 |
| 19 |
| 5 |
| 15 |
| 7 |
| 8 |
| 3 |
| 15 |
| 7 |
| 14 |
| 15 |
=[
| 32 |
| 7 |
| 57 |
| 7 |
| 40 |
| 7 |
| 14 |
| 15 |
=[
| 32 |
| 7 |
| 17 |
| 7 |
| 14 |
| 15 |
=
| 15 |
| 7 |
| 15 |
| 14 |
=
| 225 |
| 98 |
(3)12
| 9 |
| 22 |
| 1 |
| 2 |
| 4 |
| 7 |
| 8 |
| 45 |
=12
| 9 |
| 22 |
| 1 |
| 2 |
| 4 |
| 7 |
| 2 |
| 9 |
=
| 273 |
| 22 |
| 2 |
| 13 |
| 176 |
| 63 |
=
| 16 |
| 3 |
(4)2+4
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
| 1 |
| 42 |
=(2+4+6+8+10+12)+(
|
=(2+12)×6÷2+(
|
=42+(
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 6 |
| 1 |
| 6 |
| 1 |
| 7 |
=42+(
| 1 |
| 2 |
| 1 |
| 7 |
=42+
| 5 |
| 14 |
=42
| 5 |
| 14 |
(5)12345678912-1234567890×1234567892,
=12345678912-(1234567891-1)(1234567891+1),
=12345678912-(12345678912-1),
=12345678912-12345678912+1,
=1;
(6)
| 1 |
| 3 |
| 1 |
| 15 |
| 1 |
| 35 |
| 1 |
| 63 |
| 1 |
| 399 |
=
|
=
|
=
| 1 |
| 2 |
| 1 |
| 21 |
=
| 1 |
| 2 |
| 20 |
| 21 |
=
| 10 |
| 21 |
练习册系列答案
相关题目