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標題:

H.C.F和L.C.M點做 幫幫我 快(20分)

發問:

15=21=HCF=LCM=24=40=HCF=LCM=27=36=HCF=LCM=56=64=HCF=LCM=22=55=HCF=LCM=42=70=HCF=LCM=72=84=96=HCF=LCM=15=35=48=HCF=LCM=25=35=HCF=LCM=36=44=HCF=LCM=33=39=HCF=LCM=88=96=HCF=LCM=33=77HCF=LCM=63=84=HCF=LCM=... 顯示更多 15= 21= HCF= LCM= 24= 40= HCF= LCM= 27= 36= HCF= LCM= 56= 64= HCF= LCM= 22= 55= HCF= LCM= 42= 70= HCF= LCM= 72= 84= 96= HCF= LCM= 15= 35= 48= HCF= LCM= 25= 35= HCF= LCM= 36= 44= HCF= LCM= 33= 39= HCF= LCM= 88= 96= HCF= LCM= 33= 77 HCF= LCM= 63= 84= HCF= LCM= 78= 91= 104= HCF= LCM= 45= 55= 72= HCF= LCM= 78= 91= 104= HCF= LCM= 45= 55= 72= HCF= LCM= 70= 84= 98= HCF= LCM= 66= 72= 138= HCF= LCM=

最佳解答:

HCF LCM 15, 21 3 105 24, 40 8 120 27, 36 9 108 56, 64 8 448 22, 55 11 110 42, 70 14 210 72,84,96 12 2016 15,35,48 ? ?(i don't know too) 25, 35 5 1225 36, 44 4 396 33,39 3 429 88,96 8 1056 33, 77 11 231 63, 84 21 252 . . . . . . . . . . .(after this i don't know how to do la, very very sorry!!!) The answer are not really all correct, if you mind, check it and do it la) thx~

其他解答:

例: P = a x a x b x c x d Q = a x b x b x d x e R = a x b x c x c x f HCF是只取各數共有的因數 = a x b 至於LCM則取每個因數出現最多的次數, 因數 a 在 P 出現最多次數 : a x a 因數 b 在 Q 出現最多次數 : b x b 因數 c 在 R 出現最多次數 : c x c 因數 d 在 P 或 Q 出現最多次數 : d 因數 e 在 Q 出現最多次數 : e 因數 f 在 R 出現最多次數 : f = a x a x b x b x c x c x d x e x f 15=3x5, 21=3x7 HCF=3, LCM=3x5x7=105 24=2x2x2x3, 40=2x2x2x5 HCF=2x2x2=8, LCM=2x2x2x3x5=120 27=3x3x3, 36=2x2x3x3 HCF=3x3=9, LCM=2x2x3x3x3=108 56=2x2x2x7, 64=2x2x2x2x2x2 HCF=2x2x2=8, LCM=2x2x2x2x2x2x7=448 22=2x11, 55=5x11 HCF=11, LCM=2x5x11=110 42=2x3x7, 70=2x5x7 HCF=2x7=14, LCM=2x3x5x7=210 72=2x2x2x3x3, 84=2x2x3x7, 96=2x2x2x2x2x3 HCF=2x2x3=12, LCM=2x2x2x2x2x3x3x7=2016 15=3x5, 35=5x7, 48=2x2x2x2x3 HCF=1, LCM=2x2x2x2x3x5x7=1680 25=5x5, 35=5x7 HCF=5, LCM=5x5x7=175 36=2x2x3x3, 44=2x2x11 HCF=2x2=4, LCM=2x2x3x3x11=396 33=3x11, 39=3x13 HCF=3, LCM=3x11x13=429 88=2x2x2x11, 96=2x2x2x2x2x3 HCF=2x2x2=8, LCM=2x2x2x2x2x3x11=1056 33=3x11, 77=7x11 HCF=11, LCM=3x7x11=231 63=3x3x7, 84=2x2x3x7 HCF=3x7=21, LCM=2x2x3x3x7=252 78=2x3x13, 91=7x13, 104=2x2x2x13 HCF=13, LCM=2x2x2x3x7x13=2184 45=3x3x5, 55=5x11, 72=2x2x2x3x3 HCF=1, LCM=2x2x2x3x3x5x11=3960 70=2x5x7, 84=2x2x3x7, 98=2x7x7 HCF=2x7=14, LCM=2x2x3x5x7x7=2940 66=2x3x11, 72=2x2x2x3x3, 138=2x3x23 HCF=2x3=6, LCM= 2x2x2x3x3x11x23=182166CC7293C79127CE5