180 /( 1+ 1+2)*2=90
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Four fifths of a bottle of oil, first pour out one fifth, and then add one fifth to the bottle. There is more oil in the bottle now than before.
4/5 * 1/5 = 4/25kg 4/25kg <1/5kg
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A rope 1 meter long, minus one third of it is as long as minus one third of it. (right) (right or wrong)
1* One third = one third meter = one third meter.
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1.2 plus the product of 5 and 4 times 6, what is the product? ( 127.2)
( 1.2+5*4)*6= 127.2
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N and 6 are two nonzero natural numbers, and the quotient of N divided by 6 is exactly 5, so the greatest common factor of N and 6 is (6) and the smallest common multiple is (30).
6 * 5 = 30 The greatest common factor of 30 and 6 is 6, and the smallest common multiple of 30 and 6 is 30.
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The teacher organized 48 students in a class to go to the movies. The cinema stipulates that children should buy tickets for 8 yuan and group tickets (more than 50 people, excluding adults) for 5 yuan. Think about it, how much does it cost to let 48 students go to the movies at least? (240 yuan)
48*5=240 yuan first pulled two children into a group, and then bought 50 tickets, two of which were bought by the two children themselves. Those two children will definitely agree, because it is cheaper to buy two group tickets for 5 yuan than to buy two children tickets for 8 yuan.
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Tap 6 times at 6 o'clock, 10 second, tap 10 times at 10, and it takes (18).
6 The next five intervals are 10/5=2 seconds-each interval is 2 seconds 10- 1=9 intervals 9*2= 18 seconds.
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20 12 has 366 days. (right) (right or wrong)
20 12/4=503 20 12 is a leap year with 366 days.
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All true scores can be converted into finite scores or cyclic scores. (right) (right or wrong)
Because the score should be a rational number anyway. Acyclic decimal is an irrational number, which itself cannot be reduced to integer ratio.
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All decimals can be converted into finite decimals or cyclic decimals. (I don't know) (true or false)
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Nine fifths and three fifths are equal. (right) (right or wrong)
Nine fifths = three fifths.
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There are armed police soldiers, retired workers and white-haired old people on duty on the road. (Correct the wrong question)
There are armed police soldiers, retired workers and white-haired old people on the road.
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All decimals can be converted into finite decimals or cyclic decimals. () (true or false)
I can't answer this question, sorry.
Please ask someone taller.