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1. Three out of eighty-six / one out of eighty-seven 2. An engineering team built a highway. 38m in the first day, 42m in the second day. The second day more than the first day was 1 / 28 of the total length of the road. How many meters in the total length of the road? How many parts of the road were built in the two days 3. Two jackets with the original price of 1200 yuan were sold in the shopping mall. It is known that one of them earned 1 / 5 and the other lost 1 / 5. What are the current prices of these two jackets? (there must be a formula, and you'd better answer it) 4. There are two boxes of fruit. 3 / 5 of the weight of box a is equal to 3 / 4 of box B. what is the weight of Box B? (write the answer directly) 5. To make a part, it takes 5 minutes for a, 7 minutes for B, and 1 / 4 of every minute for C. among the three people, () is the most effective 6. Read a science and technology book, read 1 / 6 of it every day, and finish 1 / 2 of the book in () days 7. When the value of x equals () or (), X2 = 6x 8.1/30 + 1 / 42 + 1 / 56 + 1 / 72 + 1 / 90 Those who answer all the above questions will consider adding! /On behalf of the division sign, answer to mark the question number!
Three out of 86 / one out of 87 = 86 / 3 / 87 = 86 / 261 an engineering team built a highway. 38m was built on the first day, 42m on the second day. The second day more than the first day was 1 / 28 of the total length of the road. How many meters of the total length of the road? How many parts of the total length of the road were built in two days? (42-38) △ 1 / 28 = 112 (38 + 42) △ 1
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