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用递等式计算,能简算的要简算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2
用递等式计算,能简算的要简算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2
2025-03-11 22:40:43
推荐回答(1个)
回答1:
(1)25×12-850÷17
=25×4×3-50,
=300-50,
=250;
(2)(3.2÷16+10.8)÷22
=(0.2+10.8)÷22,
=11÷22,
=0.5;
(3)3.2×12.5×2.5
=0.8×4×12.5×2.5,
=(12.5×0.8)×(2.5×4),
=10×10,
=100;
(4)7.05-3.84-0.16-1.05
=7.05-1.05-(3.84+0.16),
=6-4,
=2;
(5)
8
17
×9-8÷
17
8
=
8
17
×9-8×
8
17
,
=(9-8)×
8
17
,
=1×
8
17
,
=
8
17
;
(6)
5
6
×[2÷(
7
8
-
3
4
)]
=
5
6
×[2÷
1
8
],
=
5
6
×16,
=
40
3
.
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