题目内容
脱式计算,能简算的要简算:
2
| 3
| ||||||||||||
85×1
| 1÷[(4
|
(1)2
+4.6+4
+5.4,
=(2
+4
)+(4.6+5.4),
=7+10,
=17;
(2)3
×2
-2
×3
,
=2
×(3
-3
),
=
×
,
=1;
(3)85×1
+2.5÷4
,
=85×
+2.5×
,
=102+0.6,
=102.6;
(4)1÷[(4
-0.005×700)÷1
],
=1÷[(4
-3.5)÷1
],
=1÷[(4
-3
)÷1
],
=1÷[
÷1
],
=1÷[
×
],
=1÷
,
=2.
| 3 |
| 5 |
| 2 |
| 5 |
=(2
| 3 |
| 5 |
| 2 |
| 5 |
=7+10,
=17;
(2)3
| 11 |
| 15 |
| 1 |
| 7 |
| 1 |
| 7 |
| 4 |
| 15 |
=2
| 1 |
| 7 |
| 11 |
| 15 |
| 4 |
| 15 |
=
| 15 |
| 7 |
| 7 |
| 15 |
=1;
(3)85×1
| 1 |
| 5 |
| 1 |
| 6 |
=85×
| 6 |
| 5 |
| 6 |
| 25 |
=102+0.6,
=102.6;
(4)1÷[(4
| 1 |
| 7 |
| 2 |
| 7 |
=1÷[(4
| 1 |
| 7 |
| 2 |
| 7 |
=1÷[(4
| 1 |
| 7 |
| 1 |
| 2 |
| 2 |
| 7 |
=1÷[
| 9 |
| 14 |
| 2 |
| 7 |
=1÷[
| 9 |
| 14 |
| 7 |
| 9 |
=1÷
| 1 |
| 2 |
=2.
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