题目内容
用递等式计算. (能简算的要简算)
|
| 3.7×99+3.7 | ||||||||||||||
| 360÷15+2.5×16 |
|
(1)
×(
÷
),
=
×
,
=
;
(2)
+
÷
,
=
+
,
=2;
(3)3.7×99+3.7,
=3.7×(99+1),
=3.7×100,
=370;
(4)
+
+
+
,
=(
+
)+(
+
),
=1+1,
=2;
(5)360÷15+2.5×16,
=24+40,
=64;
(6)
÷〔1-(
-
)〕,
=
÷〔1-
〕,
=
÷
,
=
.
| 3 |
| 5 |
| 5 |
| 12 |
| 3 |
| 4 |
=
| 3 |
| 5 |
| 5 |
| 9 |
=
| 1 |
| 3 |
(2)
| 5 |
| 6 |
| 7 |
| 12 |
| 1 |
| 2 |
=
| 5 |
| 6 |
| 7 |
| 6 |
=2;
(3)3.7×99+3.7,
=3.7×(99+1),
=3.7×100,
=370;
(4)
| 3 |
| 7 |
| 5 |
| 11 |
| 4 |
| 7 |
| 6 |
| 11 |
=(
| 3 |
| 7 |
| 4 |
| 7 |
| 5 |
| 11 |
| 6 |
| 11 |
=1+1,
=2;
(5)360÷15+2.5×16,
=24+40,
=64;
(6)
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
=
| 2 |
| 3 |
| 1 |
| 12 |
=
| 2 |
| 3 |
| 11 |
| 12 |
=
| 8 |
| 11 |
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