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PEP sixth grade mathematics exercise book Volume I answers page 8
How to calculate 1.2/11 × 3 = 6 / 11 integer multiplied by fraction? Answer: if the numerator and denominator are multiplied separately, the fraction can be reduced. For example, if 2 / 3 × 3 / 4 = 6 / 12, the fraction is divided into 1 / 2. The algorithm of fractional multiplication: the numerator of fraction and the product of integer multiplication are used as the numerator, and the denominator remains unchanged
Sixth grade first volume mathematics exercise book (PEP) 32 page 7
For a project, it takes 8 days for team a to do it alone and 24 days for team B to do it alone. If the two teams work together, how many days will it take to complete it?
Please
This is an engineering problem. If Party A works alone for 8 days, it will be 1 / 8 every day. If Party B works alone for 24 days, it will be 1 / 24 every day. If they work together, they will take the total amount of work / work efficiency = time, that is, 1 / (1 / 8 + 1 / 24) = 6 (days). If they encounter such problems in the future, they can use this formula to calculate
Shanghai Education Press
I want 24.3 (3)
I'm not copying. I want a simple idea
Children, do not copy the answer to cheat the teacher. Do not understand the teacher, the teacher likes studious children
Answer 6.8, 6.9 (p38 ~ 40)
Write out a group of integer solutions, a group of negative integer solutions and a group of positive integer solutions of quadratic equation 4x-3y = 15
Find the nonnegative integer solution of the quadratic equation 2x + 3Y = 20Y = 20
It's better to send 6.9 as well,
x=3,y=-1,
x=6,y=3
The title of the second question
Shanghai's mathematics exercise book
A fruit merchant bought 100 apples from a wholesale fruit shop, and it cost 120 yuan in total. At retail, 70 larger apples were sold at 1.8 yuan each, and the remaining 30 smaller apples were sold at 0.5 yuan each. The profit and loss ratio of the fruit merchant in this transaction was calculated
Xiaojie's mother paid 69 yuan less than the original price when she bought something with 70% discount. What was the original price of the thing?
A unit needs to pay VAT at the rate of 17%, and the tax payable is 6400 yuan. What is the tax amount of this unit? (accurate to yuan)
1.70 * 1.8 = 126 yuan, 30 * 0.5 = 15 yuan, 126 + 15 = 141 yuan ∵ 141 yuan ∵ 120 yuan ∵ surplus. 141-120 = 21 yuan, 21 ∵ 120 × 100% = 0.175 × 100% = 17.5% a: the fruit merchant made a profit of 17.5% in this transaction. 2. Let the original price be x yuan. X-70% x = 6930% x = 69x = 2303.6400 ∵ 17% ≈ 37647 yuan
The second semester of sixth grade (Trial Edition) Shanghai education press mathematics exercise book 6.3 answers p26-27 answers only need 10-12
1 9-3X = 2x-89 + 8 = 2x + 3xx = 17 / 15 (fraction) 2 5x-9x = - 60x = 153 5Y + 6y = 33y = 34 (fraction is omitted) (denominator is omitted) 15x-7x = 31 + 9x = 512 (1 is the first step and so on) 1 3 no * 102 1 no * 53 - x =
Calculation problems of P6 and 7 in mathematics exercise book of Shanghai Education Press
1、（—12）+11+（—8）+39
2、45+（—9）+（—91）+15
3、（—5.4）+0.2+（0.6）+0.8
4、0.65+（—1.9）+（—0.1）+（—0.65）
5. (- 3 / 4) + (- 1 / 6) + 3 / 8 + (- 5 / 12)
6. 1 / 4 + (- 0.24) + (- 2 / 5) + 3.6
1、(-12)+11+(-8)+39=11+39+[(-12)+(-8)]=50+(-20)=302、45+(-9)+(-91)+15=45+15+[(-9)+(-91)]=60+(-100)=-403、(-5.4)+0.2+(-0.6)+0.8=0.2+0.8+[(-0.6)+(-5.4)]=1+(-6)=-54、0.65+(-1.9)+(-0.1)+(-0.65)=0.65+(-0.6...
How to write p69 thinking questions in sixth grade math exercise book
A and B are required to score 8 points for each hit and 3 points for each miss. Each of them has played 10 shots, of which a has 22 points more than B. how many shots do a and B hit?
Let a hit X and B hit y, then we can make the following equation
①8X-3(10-X)+8Y-3(10-Y)=116
②8X-3(10-X)-8Y-3(10-Y)=22
The results are as follows
①11X+11Y=176
②11X-11Y=22
According to the quadratic equation of two variables, the solution is as follows
X=9
Y=7
So: nine in a, seven in B
The fourth question on the 13th side of mathematics exercise book
0.34*101
=0.34*(100+1)
=0.34*100+0.34*1
=34+0.34
=34.34
It's here, isn't it?
A math problem for grade six
Here's what I do:
3.2—（-3/4）—5/24+（-2.1）
Original formula = 3.2-5 / 24 + [- (3 / 4 + 2.1)]
=3.2-5/24+2.85
I can't figure out the answer. Is there something wrong with my calculation? Or is there any other reason?
3.2—（-3/4）—5/24+（-2.1）
3.2—（-3/4）—5/24+（-2.1）
=3.2+（-2.1）—[(-3/4)+5/24]
=1.1+13/24
=11/10+13/24
=1 77 / 120
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