(1)7.29×4.6+46×1.271, =7.29×4.6+4.6×12.71, =(7.29+12.71)×4.6, =20×4.6, =92; (2)(28.7-18.6÷3.1)×0.8, =(28.7-6)×0.8, =22.7×0.8, =18.16; (3)16-5.32-4.68, =16-(5.32+4.68), =16-10, =6; (4)40.8+14.7÷(14.6-12.5), =40.8+14.7÷2.1, =40.8+7, =47.8; (5)3.7×0.125+6.3÷8, =3.7×0.125+6.3×
=(3.7+6.3)×0.125, =1.25; (6)0.72+9.6÷3.2, =0.72+3, =3.72. |