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標題:
中二數學問題求幫忙(15點)
發問:
Rational and Irrational Numbers Express 1.-√0.81 2.-√4/29/49(四又29分之49) Evaluate 3.(6√3)+(5√3)-(3√3) 4.(√125)-(√5) 5.(5√2)-(√8)+(3√2) 6.(√8)*(√18) Rationalize 7.(3√2)/(√3) 8.(-√2)/(√8) 9.√(49/2) 10.(4√15)/(√10) 有睇吾明可以問我 知道答案的plz help!!!!
最佳解答:
其他解答:
1)-0.9 2)-2又7份之1 3)24.3 4)9 5)8.5 6)i don't know,sorry~~ 7)7.14 8)-3.92 9)4.9 10)49.6 我5知啱5啱嫁
中二數學問題求幫忙(15點)
發問:
Rational and Irrational Numbers Express 1.-√0.81 2.-√4/29/49(四又29分之49) Evaluate 3.(6√3)+(5√3)-(3√3) 4.(√125)-(√5) 5.(5√2)-(√8)+(3√2) 6.(√8)*(√18) Rationalize 7.(3√2)/(√3) 8.(-√2)/(√8) 9.√(49/2) 10.(4√15)/(√10) 有睇吾明可以問我 知道答案的plz help!!!!
最佳解答:
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1.-√0.81 =-0.9 2.-√4 29/49(四又29分之49) =-√225/49 =-15/7 NOTE:帶分數要轉做假分數先至好simplify Evaluate 3.(6√3)+(5√3)-(3√3) =√3(6+5-3) =8√3 4.(√125)-(√5) =5√5-√5 =√5(5-1) =4√5 5.(5√2)-(√8)+(3√2) =5√2-2√2+3√2 =√2(5-2+3) =6√2 6.(√8)*(√18) =2√2 x 3√2 =6x2 =12 Rationalize 7.(3√2)/(√3) =3√6/3 =√6 8.(-√2)/(√8) =-√2/2√2 =-1/2 9.√(49/2) =7/√2 =7√2/2 10.(4√15)/(√10) =4√3/√2 =4√6/2 =2√6其他解答:
1)-0.9 2)-2又7份之1 3)24.3 4)9 5)8.5 6)i don't know,sorry~~ 7)7.14 8)-3.92 9)4.9 10)49.6 我5知啱5啱嫁
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