Simplify the following expressions.
1.4b×b/2
2.3+2y-3+y
3.5y-2x÷xy
4.36y 3次÷9y 2次÷4
5.a-5b×8÷10c
6.(3e)2次÷(6e 2次)3次×9e2 次
英文數學題
2007-09-25 5:56 am
回答 (1)
2007-09-25 6:40 am
✔ 最佳答案
1. 4b×b/2=2b^2
2. 3+2y-3+y
=3-3+2y-y
=y
3. 5y-2x÷xy
=5y-2x X 1/xy
=5y-2/y
4. 36y^3÷9y^2÷4 (y^3=y 3次)
=36/9/4y^3-2
=y^1
=y
5. a-5b×8÷10c
=a-40b÷10c
=a-4b÷c
6.(3e)^2÷(6e^2)^3×9e^2
=3^2e^2÷6^3e^6 X 9e^2
=9e^2÷216e^6 X 9e^2
=9÷216X9 e^2-6+2
=0.0046296e^-2 (=0.0046296/e^2)
計得快，可能有錯，check check先
收錄日期: 2021-04-13 13:37:17
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