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中一MC數學題(also要長答)

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• 木瓜酵素片在那裏可以買到呢-
• 中環威靈頓街55號既fruits & passion

• 太陽^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^@1@
• 木瓜酵素片在那裏可以買到呢-
• 中環威靈頓街55號既fruits & passion

 

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發問:

1. a^3×(2a)^4=A. 2a^7B. (2a)^7C. 16a^7D. 16a^162. What is the range of value of 29.97×39.5+198.8-204.3?A. 1100-1200B. 1000-1100C. 900-1000D. 800-9003. 1m^2=A. 100cm^2B. 1000cm^2C. 10 000cm^2D. 1 000 000cm^24. (-6x)^3/-4x^2y÷(-2y)^2=A. 27x/2y^3B. 216xyC.... 顯示更多 1. a^3×(2a)^4= A. 2a^7 B. (2a)^7 C. 16a^7 D. 16a^16 2. What is the range of value of 29.97×39.5+198.8-204.3? A. 1100-1200 B. 1000-1100 C. 900-1000 D. 800-900 3. 1m^2= A. 100cm^2 B. 1000cm^2 C. 10 000cm^2 D. 1 000 000cm^2 4. (-6x)^3/-4x^2y÷(-2y)^2= A. 27x/2y^3 B. 216xy C. -27x/y D. -27/2 x^5/y^3 5. The L.C.M of 24, 36 and 54 is A. 2×3. B. 2^2×3^2. C. 2^3×3^2. D. 2^3×3^3.

最佳解答:

1. a^3×(2a)^4 = a^3 x 16a^4 = 16a^(4+3) = 16a^7 [c] 2. What is the range of value of 29.97×39.5+198.8-204.3? < 30 * 40 + 200 - 205 < 1200 [A] 3. 1m^2 = 100cm^2 [A] (1m= 100cm) 4. (-6x)^3/-4x^2y÷(-2y)^2 = [(-6)^3 * x^3] / -4x^2y ÷ [(-2)^2*y^2] = -216x^3 / -4x^2y ÷4y^2 = -216/(-4*4) * x^(3-2) /y(1+2) = 27x/2y^3 [A] 5. The L.C.M of 24, 36 and 54 is 24 = 2*2*2* 3 36 = 2*2* 3*3 54 = 2* 3*3*3 L.C.M. is 2^3×3^3 [D]

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