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發問:

0.99÷_______=1.8

最佳解答:

0.99÷0.55=1.8 你可以用0.99÷1.8找答案

其他解答:

Question : 0.99÷_______=1.8 --------------------------------------------------- Way A : ( Use 方程 ) Let the answer is y 0.99 ÷ y = 1.8 0.99 ÷ y x y = 1.8y 0.99 = 1.8y 0.99 ÷ 1.8 = 1.8y ÷ 1.8 y = 0.55 So , the answer is 0.55 --------------------------------------------------- Way B : ( Try ) Try the answer is 1 first . 0.99 ÷ 1 = 0.99 ( The answer is too small , so the answer should be smaller ) And 0.5 , 0.99 ÷ 0.5 = 1.98 ( The answer is too big , so the answer should be bigger ) try 0.6 : 0.99 ÷ 0.6 = 1.65 ( Very close , but the answer is smaller than 1.8 , so the answer should be smaller ) 0.5 < The answer < 0.6 Try 0.53 and 0.57 0.99 ÷ 0.53 ~ 1.87 0.99 ÷ 0.57 ~ 1.74 1.74 < 1.8 ( the answer ) < 1.87 So the answer is bigger than 0.53 , but is smaller than 0.57 Try 0.55 , 0.99 ÷ 0.55 = 1.8 ( Right ! ) So the answer is 0.55 ---------------------------------------|||||0.99÷0.55=1.8|||||0.99÷1.782=1.8
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