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標題:
Maths功課...救命
發問:
"True" "False"1.) A number has decreased from 150 to 12. The percentage decrease is25%2.) The number 2000 has increased by20%. THe new value is 2400.3.) Th enumber 375 has decreased by 40%. The new value is 150.4.) Having increased by 15%, a number becomes 736. The number is... 顯示更多 "True" "False" 1.) A number has decreased from 150 to 12. The percentage decrease is25% 2.) The number 2000 has increased by20%. THe new value is 2400. 3.) Th enumber 375 has decreased by 40%. The new value is 150. 4.) Having increased by 15%, a number becomes 736. The number is 625.6 5.) A number has increased from 72 to 81. The perecentage increase is 12.5% 6.) Having decreased by 16%, a number becomes 210. The number is 250.
最佳解答:
1. false: (150-12) /150 * 100% = 92% 2. true 2000* (1+0.2) = 2400 3. false 375 * (1-0.4) = 225 4. false X * (1 + 0.15) = 736 ; X = 640 5. true (81 - 72 ) / 72 * 10% = 12.5% 6. true X * (1-0.16) = 210; X = 250
其他解答:
1. False 2.True 3.False 4.False 5.True 6.True|||||1) False 2) True 3) False 4) False 5) True 6) True|||||F T F F T TC8D74AB62542840B
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