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(2011•平和县模拟)脱式计算:(1)(2.34-3.25×6.4)÷6.5(2)89×[34-(716-14)](3)36×(16﹢19-112)(4)3.25×9.8+0.325×2.
题目详情
(2011•平和县模拟)
脱式计算: (1)(2.34-3.25×6.4)÷6.5 | (2)
| (3)36×(
| (4)3.25×9.8+0.325×2. |
▼优质解答
答案和解析
(1)(2.34-3.25×6.4)÷6.5,
=(2.34-20.8)÷6.5,
=-18.46÷6.5,
=-2.84;
(2)
×[
−(
−
)],
=
×[
−
+
],
=
×[
+
−
],
=
×[1−
],
=
×
,
=
;
(3)36×(
+
−
),
=36×
+36×
−36 ×
,
=6+4-3,
=7;
(4)3.25×9.8+0.325×2,
=3.25×9.8+3.25×0.2,
=3.25×(9.8+0.2),
=3.25×10,
=32.5.
=(2.34-20.8)÷6.5,
=-18.46÷6.5,
=-2.84;
(2)
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
=
8 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
=
8 |
9 |
3 |
4 |
1 |
4 |
7 |
16 |
=
8 |
9 |
7 |
16 |
=
8 |
9 |
9 |
16 |
=
1 |
2 |
(3)36×(
1 |
6 |
1 |
9 |
1 |
12 |
=36×
1 |
6 |
1 |
9 |
1 |
12 |
=6+4-3,
=7;
(4)3.25×9.8+0.325×2,
=3.25×9.8+3.25×0.2,
=3.25×(9.8+0.2),
=3.25×10,
=32.5.
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