99×0.43=(100-1)×0.43=43-0.43=42.57 6.11-7/32-(4/15×8/15+4/15×7/15)=6.11-7/32-[4/15×(8/15+7/15)]=71/10-7/32-4/15=213/30-8/30-7/32=41/6-7/32=656/96-21/96=635/96