题目内容
脱式计算,能简算的要简算.
13.6-(2.6+0.25÷25%)
1200÷〔56×(
-
)〕
(
×1.7+
×1.7)÷
1375+450÷15×25.
13.6-(2.6+0.25÷25%)
1200÷〔56×(
| 3 |
| 7 |
| 3 |
| 8 |
(
| 6 |
| 13 |
| 7 |
| 13 |
| 7 |
| 10 |
1375+450÷15×25.
(1)13.6-(2.6+0.25÷25%)
=13.6-(2.6+1),
=13.6-3.6,
=10;
(2)1200÷〔56×(
-
)〕
=1200÷(56×
-56×
),
=1200÷(24-21),
=1200÷3,
=400;
(3)(
×1.7+
×1.7)÷
=(
+
)×1.7×
,
=1×1.7×
,
=
;
(4)1375+450÷15×25
=1375+30×25,
=1375+750,
=2125.
=13.6-(2.6+1),
=13.6-3.6,
=10;
(2)1200÷〔56×(
| 3 |
| 7 |
| 3 |
| 8 |
=1200÷(56×
| 3 |
| 7 |
| 3 |
| 8 |
=1200÷(24-21),
=1200÷3,
=400;
(3)(
| 6 |
| 13 |
| 7 |
| 13 |
| 7 |
| 10 |
=(
| 6 |
| 13 |
| 7 |
| 13 |
| 10 |
| 7 |
=1×1.7×
| 10 |
| 7 |
=
| 17 |
| 7 |
(4)1375+450÷15×25
=1375+30×25,
=1375+750,
=2125.
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