问题
解答题
|
答案
(1)675-225÷15×45,
=675-15×45,
=675-675,
=0;
(2)3.5×2.6+5.4÷18,
=9.1+0.3,
=9.4;
(3)(3
-25 6
)÷(3 4
+2 7
),13 14
=
÷13 12
,17 14
=
;91 102
(4)(3.86+2×3.86+3.86)×0.25,
=(3.86×4)×0.25,
=3.86×(4×0.25),
=3.86×1,
=3.86.