Toán Lớp 7: C= 2/3.5 + 3/5.8 +11/8.19 + 13/19.32 + 25/22.47 + 30/47.70
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Toán Lớp 7: C= 2/3.5 + 3/5.8 +11/8.19 + 13/19.32 + 25/22.47 + 30/47.70
Comments ( 2 )
C= 2/3.5 + 3/5.8 +11/8.19 + 13/19.32 + 25/32.47 + 30/47.70
C=(5-3/3.5)+(8-5/5.8)+(19-8/8.19)+(32-19/19.32)+(47-22/32.47)+(70-47/47.70)
C=(1/3-1/5)+(1/5-1/8)+(1/8-1/19)+(1/19-1/32)+(1/32-1/47)+(1/47+1/70)
C=1/3-1/5+1/5-1/8+1/8-1/19+1/19-1/32+1/32-1/47+1/47-1/70
C=1/3-1/70=67/210
Giải đáp:
C = 67/210
Lời giải và giải thích chi tiết:
C = 2 / 3.5 + 3 / 5.8 + 11 / 8.19 + 13/19.32 + 25 / 32.47 + 30 / 47.70
C = 1/3 – 1/5 + 1/5 – 1/8 + 1/8 – 1/19 + 1/19 – 1/32 + 1/32 – 1/47 + 1/47 – 1/70
C = 1/3 – 1/70
C = 70/210 – 3/210
C = 67/210