计算下列各题,能简便的要简便计算316÷(1+13×134)(115+217)×15×17(9.6?1012÷1.25)÷(113×0.75)5.
计算下列各题,能简便的要简便计算316÷(1+13×134)(115+217)×15×17(9.6?1012÷1.25)÷(113×0.75)5.66×7.28-3.16...
计算下列各题,能简便的要简便计算316÷(1+13×134)(115+217)×15×17(9.6?1012÷1.25)÷(113×0.75)5.66×7.28-3.16×3.16-3.16×4.122012×0.875+201.2×1.2511×2+12×3+13×4+…+199×100.
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(1)3
÷(1+
×1
),
=3
÷(1+
×
),
=3
÷(1+
),
=
÷
,
=
×
,
=2;
(2)(
+
)×15×17,
=
×15×17+
×15×17,
=17+30,
=47;
(3)(9.6-10
÷1.25)÷(1
×0.75),
=(9.6-
÷
)÷(
×
),
=(9.6-
×
)÷1,
=(9.6-8.4)÷1,
=1.2;
(4)5.66×7.28-3.16×3.16-3.16×4.12,
=5.66×7.28-3.16×(3.16+4.12),
=5.66×7.28-3.16×7.28,
=(5.66-3.16)×7.28,
=2.5×7.28,
=18.2;
(5)2012×0.875+201.2×1.25,
=2012×0.875+2012×0.125,
=2012×(0.875+0.125),
=2012×1,
=2012;
(6)
+
+
+…+
,
=1-
+
1 |
6 |
1 |
3 |
3 |
4 |
=3
1 |
6 |
1 |
3 |
7 |
4 |
=3
1 |
6 |
7 |
12 |
=
19 |
6 |
19 |
12 |
=
19 |
6 |
12 |
19 |
=2;
(2)(
1 |
15 |
2 |
17 |
=
1 |
15 |
2 |
17 |
=17+30,
=47;
(3)(9.6-10
1 |
2 |
1 |
3 |
=(9.6-
21 |
2 |
5 |
4 |
4 |
3 |
3 |
4 |
=(9.6-
21 |
2 |
4 |
5 |
=(9.6-8.4)÷1,
=1.2;
(4)5.66×7.28-3.16×3.16-3.16×4.12,
=5.66×7.28-3.16×(3.16+4.12),
=5.66×7.28-3.16×7.28,
=(5.66-3.16)×7.28,
=2.5×7.28,
=18.2;
(5)2012×0.875+201.2×1.25,
=2012×0.875+2012×0.125,
=2012×(0.875+0.125),
=2012×1,
=2012;
(6)
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
99×100 |
=1-
1 |
2 |
1 |