题目内容
| (4.5×1.1×4.8)÷(3.3×0.8×0.5) | 12.5×2.5×0.8×4. | 6.3×
| ||||||||
| 7÷(7-7×0÷7+7÷7) | 18×45×(
| 2.25×
|
(1)(4.5×1.1×4.8)÷(3.3×0.8×0.5),
=(4.5÷0.5)×(4.8÷0.8)×(1.1÷3.3),
=9×6×1.1÷3.3,
=9×(6×1.1÷3.3),
=9×(6.6÷3.3),
=9×2,
=18;
(2)12.5×2.5×0.8×4,
=(12.5×0.8)×(2.5×4),
=10×10,
=100;
(3)6.3×
+3.7÷
,
=6.3×0.75+3.7×0.75,
=(6.3+3.7)×0.75,
=10×0.75,
=7.5;
(4)7÷(7-7×0÷7+7÷7),
=7÷(7-0+1),
=7÷8,
=
;
(5)18×45×(
+
),
=(18×45)×(
+
),
=(18×45)×
+(18×45)×
,
=15×45+18×9,
=675+162,
=837;
(6)2.25×
-2.75×
+3×225%,
=2.25×
-
×2.25+3×2.25,
=2.25×(
-
+3),
=2.25×(1+3),
=2.25×4,
=9.
=(4.5÷0.5)×(4.8÷0.8)×(1.1÷3.3),
=9×6×1.1÷3.3,
=9×(6×1.1÷3.3),
=9×(6.6÷3.3),
=9×2,
=18;
(2)12.5×2.5×0.8×4,
=(12.5×0.8)×(2.5×4),
=10×10,
=100;
(3)6.3×
| 3 |
| 4 |
| 4 |
| 3 |
=6.3×0.75+3.7×0.75,
=(6.3+3.7)×0.75,
=10×0.75,
=7.5;
(4)7÷(7-7×0÷7+7÷7),
=7÷(7-0+1),
=7÷8,
=
| 7 |
| 8 |
(5)18×45×(
| 5 |
| 6 |
| 1 |
| 5 |
=(18×45)×(
| 5 |
| 6 |
| 1 |
| 5 |
=(18×45)×
| 5 |
| 6 |
| 1 |
| 5 |
=15×45+18×9,
=675+162,
=837;
(6)2.25×
| 15 |
| 4 |
| 9 |
| 4 |
=2.25×
| 15 |
| 4 |
| 11 |
| 4 |
=2.25×(
| 15 |
| 4 |
| 11 |
| 4 |
=2.25×(1+3),
=2.25×4,
=9.
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