题目内容
脱式计算,能够简算的一定要简算.
| 4-
| 9
| ||||||||||||||||
| 25×(4×11)×7 | (
| 101×120-83-37. |
①
÷[(
+
)×
],
=
÷
÷(
+
),
=1÷
,
=1×
,
=2
;
②4-
÷4-
,
=4-
×
-
,
=4-(
+
),
=4-1,
=3;
③9
+9.8+9.25×
,
=9.25×(9.8+0.2),
=9.25×10,
=92.5;
④25×(4×11)×7,
=(25×4)×(11×7),
=100×77,
=7700;
⑤(
+
)÷
,
=(
+
)×60,
=60×
+
×60,
=5+36,
=41;
⑥101×120-83-37,
=101×120-(83+37),
=120×(101-1),
=120×100,
=12000.
| 3 |
| 8 |
| 1 |
| 5 |
| 1 |
| 4 |
| 3 |
| 8 |
=
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 5 |
| 1 |
| 4 |
=1÷
| 9 |
| 20 |
=1×
| 20 |
| 9 |
=2
| 2 |
| 9 |
②4-
| 4 |
| 5 |
| 4 |
| 5 |
=4-
| 4 |
| 5 |
| 1 |
| 4 |
| 4 |
| 5 |
=4-(
| 1 |
| 5 |
| 4 |
| 5 |
=4-1,
=3;
③9
| 1 |
| 4 |
| 1 |
| 5 |
=9.25×(9.8+0.2),
=9.25×10,
=92.5;
④25×(4×11)×7,
=(25×4)×(11×7),
=100×77,
=7700;
⑤(
| 1 |
| 12 |
| 3 |
| 5 |
| 1 |
| 60 |
=(
| 1 |
| 12 |
| 3 |
| 5 |
=60×
| 1 |
| 12 |
| 3 |
| 5 |
=5+36,
=41;
⑥101×120-83-37,
=101×120-(83+37),
=120×(101-1),
=120×100,
=12000.
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