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Help Me >.< 中一數 十!!!!!!!萬!!!!!!火!!!!!!!急!!!!!!!!!!!
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最佳解答:
1)18-3除(3x7) =18-3/21 =18-7 =11 2) 1-3% x 50% 3%=3/100 3/100=0.03 50%=50/100 50/100=1/2 1/2=0.5 =1-(0.03 x 0.5) =1-0.015 =0.985 3) 3x5% + 0.25 5%=5/100 5/100=1/20 1/20=0.05 =(3 x 0.05)+0.25 =0.15+0.25 =0.4 4) 2除(40%-5%) 2除35% 35%=35/100 35/100=7/20 2除20分之7 =2x20/7 =40/7 40/7=5又7分之5 5) 1又5分3 x 25% 除0.4 1又5分3=8/5 25%=25/100 25/100=1/4 0.4=4/10 4/10=2/5 8/5 x 1/4除2/5 =8/5 x 1/4 x 5/2 =1 6) 9.6除1.6 - 1又5分2 x1.1 9.6除1.6=6 1又5分2 x1.1 1又5分2= 1.4 1.4 x 1.1 =1.54 9.6除1.6 - 1又5分2 x1.1 =6-1.54 =4.46 7) 3 - 2分1 分之 3 x 2分1 2分1 分之 3=3/1/2 3/1/2 =3除2分之1 3除2分之1 =3 x 2/1 3 x 2/1 = 6 3 - 2分1 分之 3 x 2分1 =3-6 x 2分1 =3-3 =0 8)以質因數連乘式表示 36,,42,,105 , 求它們的H.C.F和L.C.M 36=2x2x3x3 42=2x3x7 105=3x5x7 36,,42,,105, 的H.C.F是 3 36,,42,,105, 的L.C.M是 2x3x3x7x2x5=1260 9) 以短除法 72,,80,,108 的 H.C.F 和 L.C.M . =72/2, 80/2, 108/2 =36,40, 54 =36/2, 40/2, 54/2 =18, 20, 27 72,,80,,108 的 H.C.F是 2x2=4 72,,80,,108 的L.C.M是 2x2x3x3x2x2x5x3=2160
其他解答:
1)18-3/(3*7) =18-3/21 =18-1/7 =17 6/7 2) 1-3% x 50% =1-0.03*0.5 =1-0.015 =0.985 3) 3x5% + 0.25 =3*0.05+0.25 =0.15+0.25 =0.4 4) 2/(40%-5%) =2/35% =2/0.35 =40/7 5) (1 3/5 x 25%) / 0.4 =(8/5*1/4)/0.4 =(2/5)/0.4 =0.4/0.4 =1 6) 9.6/1.6 - 1 2/5 x1.1 =6- 7/5*1.1 =6-77/50 =223/50 =4.46 7) 3 - 2分1 分之 3 x 2分1 唔明.... 係咪3-3/1/2*1/2 ? =3-3/2*1/2 =3-3/4 =9/4 8&9打唔到個式, 唔好意思... 希望幫到你...|||||教你未教的東東 1%=0.01 100%=1 59%=0.59 77.77%=0.7777 ...... 如此一來就易了 /係除 又係分數 1/5係1除5 又係5分之1咁解 18-3/3x7=18-7=11!!!! 1-3%x50%=1-0.03x0.5=1-0.015=0.985!!!!! 3x5%+0.25=3x0.05+0.25=0.15x0.25=0.4!!!!! 2/(40%-5%)=2/0.35=40/7 7分之40!!!!!! (1+3/5)x25%/0.4=8/5x0.25/0.4=2/5/0.4=50/5=10!!!! 9.6/1.6-(1+2/5)x1.1= 6-7/5x1.1=6-7.7/5=30/5-7.7/5=22.3/5!!!!! 3-(1/2)/3x1/2=3-1/6x1/2=3-1/12=35/12!!!!!! 36=2x2x3x3 42=7x2x3 105=5x3x7 hcf=3 lcm=3x3x2x2x7x5=840 2 72 80 108 2 36 40 54 ----------------- 18 20 27 hcf=2x2=4 lcm=4x18x20x27=38880
Help Me >.< 中一數 十!!!!!!!萬!!!!!!火!!!!!!!急!!!!!!!!!!!
發問:
此文章來自奇摩知識+如有不便請留言告知
可吾可以幫我丫>..< 1)18-3除(3x7) 2) 1-3% x 50% 3) 3x5% + 0.25 4) 2除(40%-5%) 5) 1又5分3 x 25% 除0.4 6) 9.6除1.6 - 1又5分2 x1.1 7) 3 - 2分1 分之 3 x 2分1 8)以質因數連乘式表示 36,,42,,105 , 求它們的H.C.F和L.C.M 9) 以短除法 72,,80,,108 的 H.C.F 和 L.C.M .最佳解答:
1)18-3除(3x7) =18-3/21 =18-7 =11 2) 1-3% x 50% 3%=3/100 3/100=0.03 50%=50/100 50/100=1/2 1/2=0.5 =1-(0.03 x 0.5) =1-0.015 =0.985 3) 3x5% + 0.25 5%=5/100 5/100=1/20 1/20=0.05 =(3 x 0.05)+0.25 =0.15+0.25 =0.4 4) 2除(40%-5%) 2除35% 35%=35/100 35/100=7/20 2除20分之7 =2x20/7 =40/7 40/7=5又7分之5 5) 1又5分3 x 25% 除0.4 1又5分3=8/5 25%=25/100 25/100=1/4 0.4=4/10 4/10=2/5 8/5 x 1/4除2/5 =8/5 x 1/4 x 5/2 =1 6) 9.6除1.6 - 1又5分2 x1.1 9.6除1.6=6 1又5分2 x1.1 1又5分2= 1.4 1.4 x 1.1 =1.54 9.6除1.6 - 1又5分2 x1.1 =6-1.54 =4.46 7) 3 - 2分1 分之 3 x 2分1 2分1 分之 3=3/1/2 3/1/2 =3除2分之1 3除2分之1 =3 x 2/1 3 x 2/1 = 6 3 - 2分1 分之 3 x 2分1 =3-6 x 2分1 =3-3 =0 8)以質因數連乘式表示 36,,42,,105 , 求它們的H.C.F和L.C.M 36=2x2x3x3 42=2x3x7 105=3x5x7 36,,42,,105, 的H.C.F是 3 36,,42,,105, 的L.C.M是 2x3x3x7x2x5=1260 9) 以短除法 72,,80,,108 的 H.C.F 和 L.C.M . =72/2, 80/2, 108/2 =36,40, 54 =36/2, 40/2, 54/2 =18, 20, 27 72,,80,,108 的 H.C.F是 2x2=4 72,,80,,108 的L.C.M是 2x2x3x3x2x2x5x3=2160
其他解答:
1)18-3/(3*7) =18-3/21 =18-1/7 =17 6/7 2) 1-3% x 50% =1-0.03*0.5 =1-0.015 =0.985 3) 3x5% + 0.25 =3*0.05+0.25 =0.15+0.25 =0.4 4) 2/(40%-5%) =2/35% =2/0.35 =40/7 5) (1 3/5 x 25%) / 0.4 =(8/5*1/4)/0.4 =(2/5)/0.4 =0.4/0.4 =1 6) 9.6/1.6 - 1 2/5 x1.1 =6- 7/5*1.1 =6-77/50 =223/50 =4.46 7) 3 - 2分1 分之 3 x 2分1 唔明.... 係咪3-3/1/2*1/2 ? =3-3/2*1/2 =3-3/4 =9/4 8&9打唔到個式, 唔好意思... 希望幫到你...|||||教你未教的東東 1%=0.01 100%=1 59%=0.59 77.77%=0.7777 ...... 如此一來就易了 /係除 又係分數 1/5係1除5 又係5分之1咁解 18-3/3x7=18-7=11!!!! 1-3%x50%=1-0.03x0.5=1-0.015=0.985!!!!! 3x5%+0.25=3x0.05+0.25=0.15x0.25=0.4!!!!! 2/(40%-5%)=2/0.35=40/7 7分之40!!!!!! (1+3/5)x25%/0.4=8/5x0.25/0.4=2/5/0.4=50/5=10!!!! 9.6/1.6-(1+2/5)x1.1= 6-7/5x1.1=6-7.7/5=30/5-7.7/5=22.3/5!!!!! 3-(1/2)/3x1/2=3-1/6x1/2=3-1/12=35/12!!!!!! 36=2x2x3x3 42=7x2x3 105=5x3x7 hcf=3 lcm=3x3x2x2x7x5=840 2 72 80 108 2 36 40 54 ----------------- 18 20 27 hcf=2x2=4 lcm=4x18x20x27=38880
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