题目内容
计算下面各题:
2600-1600÷25÷4=
13.6÷2-0.4×7=
×9-
×6=
;
(
+
)÷
=
.
2600-1600÷25÷4=
2584
2584
; 13.6÷2-0.4×7=
4
4
;| 11 |
| 18 |
| 11 |
| 18 |
| 11 |
| 6 |
| 11 |
| 6 |
(
| 1 |
| 4 |
| 7 |
| 20 |
| 3 |
| 4 |
| 4 |
| 5 |
| 4 |
| 5 |
分析:算式(1)中的除法算式可根据一个数除以两个数等于用这个数除以这两个数的积的除法性质进行计算;
算式(2)(4)根据四则混合运算的运算顺序计算即可;
算式(3)可根据乘法分配律进行计算.
算式(2)(4)根据四则混合运算的运算顺序计算即可;
算式(3)可根据乘法分配律进行计算.
解答:解:(1)2600-1600÷25÷4
=2600-1600÷(25×4),
=2600-1600÷100,
=2600-16,
=2584;
(2)13.6÷2-0.4×7
=6.8-2.8,
=4;
(3)
×9-
×6
=(9-6)×
,
=3×
,
=
;
(4)(
+
)÷
=(
+
)×
,
=
×
,
=
.
故答案为:2584,4,
,
.
=2600-1600÷(25×4),
=2600-1600÷100,
=2600-16,
=2584;
(2)13.6÷2-0.4×7
=6.8-2.8,
=4;
(3)
| 11 |
| 18 |
| 11 |
| 18 |
=(9-6)×
| 11 |
| 18 |
=3×
| 11 |
| 18 |
=
| 11 |
| 6 |
(4)(
| 1 |
| 4 |
| 7 |
| 20 |
| 3 |
| 4 |
=(
| 5 |
| 20 |
| 7 |
| 20 |
| 4 |
| 3 |
=
| 12 |
| 20 |
| 4 |
| 3 |
=
| 4 |
| 5 |
故答案为:2584,4,
| 11 |
| 6 |
| 4 |
| 5 |
点评:完成本题要注意分析式中的数据,然后运用合适的方法进行简算.
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