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(2012•射洪县)计算.(怎样算简便就怎样算)1.47÷(2-1.02)+0.153.9×3.6+3.9×6.425.2÷4.5+3.25×1.435÷[(45−23)×914].

题目详情
(2012•射洪县)计算.(怎样算简便就怎样算)
1.47÷(2-1.02)+0.15 3.9×3.6+3.9×6.4
25.2÷4.5+3.25×1.4
3
5
÷[(
4
5
2
3
9
14
].
▼优质解答
答案和解析
①1.47÷(2-1.02)+0.15,
=1.47÷0.98+0.15,
=1.5+0.15,
=1.65;

②3.9×3.6+3.9×6.4,
=3.9×(3.6+6.4),
=3.9×10,
=39;


③25.2÷4.5+3.25×1.4,
=5.6+4.55,
=10.15;

3
5
÷[(
4
5
-
2
3
)×
9
14
],
=
3
5
÷[
2
15
×
9
14
],
=
3
5
÷
3
35

=
3
5
×
35
3

=7.