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0.125×16 3.2×5.6.4 5.74×99+5.74 4.75+3....

9.99-4.26+90.01-5.74 =9.99+90.01-(4.26+5.74) =100-10 =90

74.5+99×74.5 =74.5×(99+1) =74.5×100 =7450

9.99-4.26+90.01-5.74 =10-0.01+90+0.01-(4.26+5.74) =10+90-10 =90

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