9: ① 4.8÷10%=48 ② 43.2÷﹙1--10%﹚=43.2÷0.9=48 10: 20 7/16 8/7 11: ① 7÷25%=28 ② 21÷﹙1--25%﹚=21÷0.75=28 12: 56÷﹙1--30%﹚=56÷0.7=80 13: 33÷﹙1--45%﹚=33÷55%=60 14: ① 14÷7/13=26 ② 14÷﹙1--6/13=14÷7/13=26 15: 果汁饼干7/2÷﹙1--5/6﹚=21 牛奶饼干 21--7/2=17又二分之一 16: 33÷﹙1/5+1/6﹚=33÷﹙6/30+5/30﹚=33÷11/30=90 |