题目内容
用递等式式计算.
| (800×
| 62.7-59.4÷55×4. |
(1)
×
+
÷7,
=(
+
)×
,
=
×
,
=
;
(2)(800×
-160)÷
,
=(200-160)÷
,
=40÷
,
=80;
(3)62.7-59.4÷55×4,
=62.7-1.08×4,
=62.7-4.32,
=58.38.
| 16 |
| 27 |
| 1 |
| 7 |
| 5 |
| 27 |
=(
| 16 |
| 27 |
| 5 |
| 27 |
| 1 |
| 7 |
=
| 21 |
| 27 |
| 1 |
| 7 |
=
| 1 |
| 9 |
(2)(800×
| 1 |
| 4 |
| 1 |
| 2 |
=(200-160)÷
| 1 |
| 2 |
=40÷
| 1 |
| 2 |
=80;
(3)62.7-59.4÷55×4,
=62.7-1.08×4,
=62.7-4.32,
=58.38.
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