问题 解答题 直接写数对又快.5.7+11.8+4.3=259-56+49=(16+18)×24=4.9×81=10.1×99-9.9=4511-(511+0.5)=______:17=1732-0.22= 答案 5.7+11.8+4.3=21.8259-56+49=216(16+18)×24=74.9×81=396.910.1×99-9.9=9904511-(511+0.5)=3.5149:17=1732-0.22=8.96故答案为:21.8,216,7,396.9,990,3.5,149,8.96.