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怎样简便就怎样计算.(512+115)×24×153.7×34+5.3×0.75+34.9.9+99.9+999.96.8÷4-1.2×25%+425×0.25.

题目详情
怎样简便就怎样计算.
5
12
+
1
15
)×24×15

3.7×
3
4
+5.3×0.75+
3
4
9.9+99.9+999.9 6.8÷4-1.2×25%+4
2
5
×0.25.
怎样简便就怎样计算.
5
12
+
1
15
)×24×15

3.7×
3
4
+5.3×0.75+
3
4
9.9+99.9+999.9 6.8÷4-1.2×25%+4
2
5
×0.25.
怎样简便就怎样计算.
5
12
+
1
15
)×24×15

3.7×
3
4
+5.3×0.75+
3
4
怎样简便就怎样计算.
5
12
+
1
15
)×24×15

5
12
+
1
15
)×24×15
5
12
551212
1
15
)×24×15
1
15
111515
3.7×
3
4
+5.3×0.75+
3
4

3
4
+5.3×0.75+
3
4
3
4
3344
3
4
3
4
3344 9.9+99.9+999.9 6.8÷4-1.2×25%+4
2
5
×0.25.
9.9+99.9+999.96.8÷4-1.2×25%+4
2
5
×0.25.
2
5
×0.25.
2
5
2255
▼优质解答
答案和解析
(1)(
5
12
+
1
15
)×24×15,
=
5
12
×24×15+
1
15
×24×15,
=150+24,
=174;

(2)3.7×
3
4
+5.3×0.75+
3
4

=(3.7+5.3+1)×0.75,
=10×0.75,
=7.5;

(3)9.9+99.9+999.9,
=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)-0.1×3,
=10+100+1000-0.3,
=1110-0.3,
=1109.7;

(4)6.8÷4-1.2×25%+4
2
5
×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
5
12
555121212+
1
15
)×24×15,
=
5
12
×24×15+
1
15
×24×15,
=150+24,
=174;

(2)3.7×
3
4
+5.3×0.75+
3
4

=(3.7+5.3+1)×0.75,
=10×0.75,
=7.5;

(3)9.9+99.9+999.9,
=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)-0.1×3,
=10+100+1000-0.3,
=1110-0.3,
=1109.7;

(4)6.8÷4-1.2×25%+4
2
5
×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
1
15
111151515)×24×15,
=
5
12
×24×15+
1
15
×24×15,
=150+24,
=174;

(2)3.7×
3
4
+5.3×0.75+
3
4

=(3.7+5.3+1)×0.75,
=10×0.75,
=7.5;

(3)9.9+99.9+999.9,
=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)-0.1×3,
=10+100+1000-0.3,
=1110-0.3,
=1109.7;

(4)6.8÷4-1.2×25%+4
2
5
×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
5
12
555121212×24×15+
1
15
×24×15,
=150+24,
=174;

(2)3.7×
3
4
+5.3×0.75+
3
4

=(3.7+5.3+1)×0.75,
=10×0.75,
=7.5;

(3)9.9+99.9+999.9,
=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)-0.1×3,
=10+100+1000-0.3,
=1110-0.3,
=1109.7;

(4)6.8÷4-1.2×25%+4
2
5
×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
+
1
15
111151515×24×15,
=150+24,
=174;

(2)3.7×
3
4
+5.3×0.75+
3
4

=(3.7+5.3+1)×0.75,
=10×0.75,
=7.5;

(3)9.9+99.9+999.9,
=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)-0.1×3,
=10+100+1000-0.3,
=1110-0.3,
=1109.7;

(4)6.8÷4-1.2×25%+4
2
5
×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
3
4
333444+5.3×0.75+
3
4

=(3.7+5.3+1)×0.75,
=10×0.75,
=7.5;

(3)9.9+99.9+999.9,
=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)-0.1×3,
=10+100+1000-0.3,
=1110-0.3,
=1109.7;

(4)6.8÷4-1.2×25%+4
2
5
×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
3
4
333444.
=(3.7+5.3+1)×0.75,
=10×0.75,
=7.5;

(3)9.9+99.9+999.9,
=(9.9+0.1)+(99.9+0.1)+(999.9+0.1)-0.1×3,
=10+100+1000-0.3,
=1110-0.3,
=1109.7;

(4)6.8÷4-1.2×25%+4
2
5
×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
2
5
222555×0.25.
=6.8×
1
4
-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
1
4
111444-1.2×
1
4
+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
1
4
111444+4.4×
1
4

=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
1
4
111444,
=(6.8-1.2+4.4)×
1
4

=10×
1
4

=2.5.
1
4
111444,
=10×
1
4

=2.5.
1
4
111444,
=2.5.