Răspuns :
(3/35+1/70+1/105)÷1/140 =
= (18+3+2)/210 : 1/140 =
= 23/210 * 140 =
= 23/3 * 2 =
= 46/3
= (18+3+2)/210 : 1/140 =
= 23/210 * 140 =
= 23/3 * 2 =
= 46/3
(3/35 + 1/70 + 1/105) : 1/140 =
= (18 + 3 + 2)/210 : 1/140
= 23/210 × 140
= 23/3 × 2
= 46/3
= (18 + 3 + 2)/210 : 1/140
= 23/210 × 140
= 23/3 × 2
= 46/3