计算.(能简算的要简算)14.4÷0.125÷8 1.5×45+0.8×5.5+2×45 920÷40+23×99&nbs...
计算.(能简算的要简算)14.4÷0.125÷81.5×45+0.8×5.5+2×45920÷40+23×9959+311+49+8111005÷[42×(56?57)]...
计算.(能简算的要简算)14.4÷0.125÷8 1.5×45+0.8×5.5+2×45 920÷40+23×99 59+311+49+811 1005÷[42×(56?57)] 35÷[1-(15+17)] 848-80÷16×27 29×17131+29131×114.
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(1)14.4÷0.125÷8,
=14.4÷(0.125×8),
=14.4÷1,
=14.4;
(2)1.5×
4 |
5 |
4 |
5 |
=1.5×0.8+0.8×5.5+2×0.8,
=(1.5+5.5+2)×0.8,
=9×0.8,
=7.2;
(3)920÷40+23×99,
=23+23×99,
=23×(1+99),
=23×100,
=2300;
(4)
5 |
9 |
3 |
11 |
4 |
9 |
8 |
11 |
=(
5 |
9 |
4 |
9 |
3 |
11 |
8 |
11 |
=1+1,
=2;
(5)1005÷[42×(
5 |
6 |
5 |
7 |
=1005÷[42×
5 |
6 |
5 |
7 |
=1005÷[35-30],
=1005÷5,
=201;
(6)35÷[1-(
1 |
5 |
1 |
7 |
=35÷[1-
12 |
35 |
=35÷
23 |
35 |
=35×
35 |
23 |
=
1225 |
23 |
(7)848-80÷16×27,
=848-5×27,
=848-135,
=713;
(8)29×
17 |
131 |
29 |
131 |
=17×
29 |
131 |
29 |
131 |
=
29 |
131 |
=
29 |
131 |
=29.
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