脱式计算-|||-.881div 0.43-0.24times 3.5=-|||--(3.4+1.25times 2.4)=-|||-(31.8+3.2times 4)div 5=-|||-.5times 4div (6+3)=-|||-.64times 25times 7.8+2.2=-|||-div 2.5+2.5div 2=-|||--64.8div 1.8times 0.9-|||-.72div 4.25times 9.9=-|||--705times 6=-|||-div 2.4-2.5times 0.8=

步骤 1：计算 $2.881\div 0.43$
$2.881\div 0.43=6.7$
步骤 2：计算 $0.24\times 3.5$
$0.24\times 3.5=0.84$
步骤 3：计算 $6.7-0.84$
$6.7-0.84=5.86$
步骤 4：计算 $28-(3.4+1.25\times 2.4)$
$1.25\times 2.4=3$
$3.4+3=6.4$
$28-6.4=21.6$
步骤 5：计算 $(31.8+3.2\times 4)\div 5$
$3.2\times 4=12.8$
$31.8+12.8=44.6$
$44.6\div 5=8.92$
步骤 6：计算 $31.5\times 4\div (6+3)$
$6+3=9$
$31.5\times 4=126$
$126\div 9=14$
步骤 7：计算 $0.64\times 25\times 7.8+2.2$
$0.64\times 25=16$
$16\times 7.8=124.8$
$124.8+2.2=127$
步骤 8：计算 $2\div 2.5+2.5\div 2$
$2\div 2.5=0.8$
$2.5\div 2=1.25$
$0.8+1.25=2.05$
步骤 9：计算 $194-64.8\div 1.8\times 0.9$
$64.8\div 1.8=36$
$36\times 0.9=32.4$
$194-32.4=161.6$
步骤 10：计算 $36.72\div 4.25\times 9.9$
$36.72\div 4.25=8.64$
$8.64\times 9.9=85.536$
步骤 11：计算 $5180-705\times 6$
$705\times 6=4230$
$5180-4230=950$
步骤 12：计算 $24\div 2.4-2.5\times 0.8$
$24\div 2.4=10$
$2.5\times 0.8=2$
$10-2=8$