某修路队每个月修路254米,13个月共修路多少米?
(13×0.58﹣4.87+0.42×13﹣5.13)×4.25.
直接写出得数:16.15÷1.7+0.85÷1.7= 199+99×99= = = 10.1×99﹣9.9= 3×32+= .
用递等式计算.1+0.45÷0.9﹣0.75 ( 5.8﹣3.8÷4 )×0.8 .
①7.2×46+108×3.6 ② ③.
48.3×0.59﹣2.5×4.9×4+5.17×5.9.