(1) 0.68×1.9+0.32×1.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9 (2)10.15-10.75×0.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7) =10.15 - 10 =0.15 (3) 5.8×(3.87-0.13)+4.2×3.74 = 5.8 x 3.74 +4.2 x 3.74 = (5...
发布时间:2025-10-31 浏览量:3