题目内容
(1)(12
-4
÷2.3)÷(10
÷0.875)
(2)7.08+8.13×12.9÷(86×40.65)
(3)(2.25×
-16÷9)×(54-26+181-174+46)×100
(4)[3
-(0.2+
)×4
+0.5]÷13.5%.
| 2 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
(2)7.08+8.13×12.9÷(86×40.65)
(3)(2.25×
| 25 |
| 27 |
(4)[3
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
(1)(12
-4
÷2.3)÷(10
÷0.875)
=(12
-4.6÷2.3)÷(
÷
),
=(12
-2)÷
×
,
=
÷
×
,
=
;
(2)7.08+8.13×12.9÷(86×40.65)
=7.08+104.877÷3495.9,
=7.08+0.03,
=7.11;
(3)(2.25×
-16÷9)×(54-26+181-174+46)×100
=(
×
-
)×[(54+46)+181-(26+174)]×100,
=(
-
)×(100+181-200)×100,
=
×81×100,
=2475;
(4)[3
-(0.2+
)×4
+0.5]÷13.5%.
=[3
-(
+
)×
+
]÷13.5%,
=(3
-
×
+
)÷13.5%,
=(3
-
+
)÷13.5%,
=1.35÷0.135,
=10.
| 2 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
=(12
| 2 |
| 7 |
| 72 |
| 7 |
| 7 |
| 8 |
=(12
| 2 |
| 7 |
| 72 |
| 7 |
| 8 |
| 7 |
=
| 72 |
| 7 |
| 72 |
| 7 |
| 8 |
| 7 |
=
| 8 |
| 7 |
(2)7.08+8.13×12.9÷(86×40.65)
=7.08+104.877÷3495.9,
=7.08+0.03,
=7.11;
(3)(2.25×
| 25 |
| 27 |
=(
| 9 |
| 4 |
| 25 |
| 27 |
| 16 |
| 9 |
=(
| 25 |
| 12 |
| 16 |
| 9 |
=
| 11 |
| 36 |
=2475;
(4)[3
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 2 |
=[3
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 3 |
| 9 |
| 2 |
| 1 |
| 2 |
=(3
| 1 |
| 4 |
| 8 |
| 15 |
| 9 |
| 2 |
| 1 |
| 2 |
=(3
| 1 |
| 4 |
| 12 |
| 5 |
| 1 |
| 2 |
=1.35÷0.135,
=10.
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