4.86＋5.24－1.86 8.13＋(1.87－0.5) 14.6－9.9 1.9＋1.99＋1.999 19.43－(6.72＋1.43) 21.53＋4.87－2.53 15.21＋(4.79－2.8) 12.19－2.6－2.19－3.4 109.72－(5.62＋9.72) 0.125×3.69×8 (2.5－0.25) ×4 8.59×101 0.63×199 60÷48 7.73×0.5＋2.27÷2 8.63×25－0.063×250 9.3×10.1 3.99÷0.125÷8 0.99×0.81＋0.11×9×0.19 (5.23＋5.23＋5.23＋5.23) ×25 0.25×1.25×0.67×32 2.49×3.8＋0.249×62 3.87×4.12＋5.88×3.87 8.8÷5.5 3.25×199 4.34×0.25＋0.25×5.56＋0.025 (7.2＋54) ÷0.9 . 80÷32 7.56×101 1.25×2.5×(8＋4) . 本文来源：https://www.wddqw.com/doc/53d7d63c0e22590102020740be1e650e53eacf86.html