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Several calculation problems. Urgent solution. To process Power 2008 of (- 0.25) ×power2009 of (- 4) (2 and 3 / 5 + 1 and 3 / 20) △ 1 and 2 / 3 1 and 1 / 6 + 3 and 1 / 12 + 5 and 1 / 20 + 7 and 1 / 30 + 9 and 1 / 42
Power 2008 of (- 0.25) ×power2009 of (- 4)
=Power 2008 of (- 0.25) ×power2008 of (- 4) * (- 4)
=2008 power of [(- 0.25) × (- 4)] * (- 4)
=1*（-4）
=-4
(2 and 3 / 5 + 1 and 3 / 20) △ 1 and 2 / 3
=(13/5+23/20)÷【（25/12-5/8)÷5/3】
=15/4÷【35/24*3/5】=15/4÷7/8=30/7
1 and 1 / 6 + 3 and 1 / 12 + 5 and 1 / 20 + 7 and 1 / 30 + 9 and 1 / 42
=1+1/6+3+1/12+5+1/20+7+1/30+9+1/42
=(1+3+5+7+9)+(1/6+1/12+1/20+1/30+1/42)
=25+(1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7)
=25+5/14
=25 and 5 / 14
Several practical problems of fraction multiplication and division
1. A factory used 480 tons of water in October, 1 / 9 less than the original plan?
2. A factory used 480 tons of water in October, 1 / 9 more than the original plan?
3. Three eighths of the sheep sold in a farm have 250 left. How many sheep did the farm have?
4. A county planted 1260 hectares last year, more than one fifth of the original plan. How many hectares was the original plan?
5. The weight of silver per cubic centimeter is 21g, which is 38g lighter than that of lead per cubic centimeter. How much is the weight of lead per cubic centimeter?
6. Xiao Hong's family bought a bag of rice, ate 5 / 8 of it, and had 15 kg left. How many kg of rice did they buy?
Don't use equations
Hello colorful Hibiscus: 1. A factory uses 480 tons of water in October, 1 / 9 less than the original plan. How many tons of water is the original plan in October? 480 ^ (1-1 / 9) = 540 tons. 2. A factory uses 480 tons of water in October, 1 / 9 more than the original plan. How many tons of water is the original plan in October? 480 ^ (1 + 1 / 9) = 432 tons
What are the general steps of mark application questions
First, make clear the quantity relation of the practical problems, and list the scores in the relation. If the denominator of the scores is different, you should divide them
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