9.9×1.02 巧算
问题描述:
9.9×1.02 巧算
答
10×1.02-0.1×1.02=10.2-0.102=10.098
答
9.9×1.02 =10×1.02-0.1×1.02=10.2-0.102=10.098
9.9×1.02 巧算
10×1.02-0.1×1.02=10.2-0.102=10.098
9.9×1.02 =10×1.02-0.1×1.02=10.2-0.102=10.098