Unit 7 test of sixth grade mathematics
Class name score 1. Seating in the right place: 20% 1, a dress is cheaper than the original 15%, and the price () × 15% = the price (). 2. Dissolve 10g salt in 90g water, with salt accounting for% of the brine and water less than ()%. 3. 102 seeds were tested, 2 seeds did not germinate, and the germination rate was ()% 4, (): 10 =.
()
63
= 1.4=28÷(
)=(
)%
5. at
7,0.874,0.87,87.5%, and the smallest is (8.
), two equal numbers are (
)
And (). 6. The number of A is 1.5 times that of B, so the ratio of B to A is (), B is less than A ()% 7, A is 20% more than B, and B is less than A ()% 8. Add 50 parts of saline water containing 20% salt to 450 grams of saline water containing 10% salt. The salt content of mixed brine is ()%. 9. A rope is 4 meters long. Cut it into eight equal parts, three of which are 4 meters () and 5 meters (). 10, 30 square meters minus ()% is 24 square meters; () After the square meter is increased by 20%, it will be 30 square meters. Second, merit-based admission. 1, 1 kg
7 and 7 kg 12.5% by weight (8 7 kg 12.5% by weight 8
) 。 C, the same weight d, can't be sure
2. 30% of A is equal to 42% of B. Compare A and B (). A，A > B，A < B C，A = B 3。 For a tape recorder, the original price of each set is 220 yuan, but now it has been reduced by 100 yuan. What percentage? The column type is (). a、 100÷220 B、(220- 100) ÷ 100c、220÷ 100 D、 100 ÷ (200-65438) 5。 The grain output this year is higher than last year.
1 。 ( 5
)
This year's grain output is 12% of last year's. The grain output last year was 20% less than this year. This year's grain is 120% of last year's. This year's grain output is 100.2% of last year's.
6.0.45 1 kg can be written as (a, 45. 1% kg.
) 。 B, 45. 1 kg c,
45 1 kg 1000
7. More than 87% and less than 89% (). A, 1 B, countless c, 2 8,100t increase 10%, and then decrease 10%. The result is (). A is heavier than100t, and b is lighter than100t, or100t. 1, a number written directly. 5% 5.4+6= 9-2
2 1 : = 3 3
1-22.3%=
2 = 3 3 6.25+ 1 = 4 3 2 3 2 × ÷ × = 4 5 4 5
2 1 1×
9÷
27 = 29 5 9.625- = 8
three
1 × 18= 9
1+25%=
2. Calculate by your favorite method: 12%
7 7 7 ÷ ( + ) 15 15 5
1 1 - 3 3
1.375÷ (
1 +2.5×60%) 4
95.6× 18-95
3 ×8 5
87×(
2 7 - )+63% 3 29
16÷2.5
3. Solve the equation: 8% (1) x+25% x = 70 (2) 5x+80% x7 = 7.2 (3).
8 7 X- 12.5%= 9 8
4. Formulaic calculation: 9% (1) The sum of 60% of a number and 2 1 is equal to 33. Find this number.
②52 is 30% more than one number. What is 30% of this figure?
(3)
The difference between the sum of 3 5 7 and 0.375. What is the quotient? 4 6 24
Fourth, solve the problem. 30% (1) of the planned investment was125,000 yuan, but only100,000 yuan was actually used, which percentage was saved?
Dongfeng Toy Factory produced 180000 toys this year, 20% more than last year. How many toys did it produce?
(3) The original price of a leather sofa was 4,200 yuan, and now it is 15% off. How much cheaper than before?
(4) Workers finished processing a batch of motorcycle parts, 20%. How many parts are there in this batch?
7. If 300 pieces are processed, it will exceed 10.
(5) Last year, 96 households in ding zhuang cun planted rape and harvested 3,400 Jin of rape. The known oil yield is 42%. How many Jin of oil can each household squeeze out?
(6) Lao Li works in an enterprise. Deduct RMB 65,438+0,000 from monthly salary, pay personal income tax at 5%, and pay 60 yuan tax every month. What is Lao Li's monthly salary?
5. Technical question: 40% (1) of the two bags of fertilizer are equal in weight, with 45 kg in bag A and 24 kg in bag B. After that, the remaining fertilizer in bag A is 62.5% of that in bag B. How many kg are there in bag A and bag B respectively?
(2) Students participated in the skipping competition, with 40 girls, accounting for 55% of the total, and the number of boys was girls.
1, how many people participated in this competition? four
(3) How many girls are there in the classroom?
4 9, and then two girls came in, so the girls occupied it. Now the classroom is *** 9 19.
(4) How many ml of 23% and 18% alcohol solution should be used to prepare 1000ml alcohol solution with 20% purity?