| 0.46×7.5+0.46×2.5 3-7.14÷3.5×1.05 9.9×8.6+0.86 [20-(90.75÷6.6+2.25)]×11.6. |
| ①0.46×7.5+0.46×2.5, =0.46×(7.5+2.5), =0.46×10, =4.6; ②3-7.14÷3.5×1.05, =3-2.04×1.05, =3-2.142, =0.858; ③9.9×8.6+0.86, =99×0.86+0.86, =0.86×(99+1), =0.86×100, =86; ④[20-(90.75÷6.6+2.25)]×11.6, =[20-(13.75+2.25)]×11.6, =[20-16]×11.6, =4×11.6, =46.4. |
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