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Multiplication is a simple operation to find several identical ()?
Addend
1.3/7 × 49/9 - 4/3
2.8/9 × 15/36 + 1/27
3.12× 5/6 – 2/9 ×3
4.8× 5/4 + 1/4
5.6÷ 3/8 – 3/8 ÷6
6.4/7 × 5/9 + 3/7 × 5/9
7.5/2 -（ 3/2 + 4/5 ）
8.7/8 + （ 1/8 + 1/9 ）
9.9 × 5/6 + 5/6
10.3/4 × 8/9 - 1/3
11.7 × 5/49 + 3/14
12.6 ×（ 1/2 + 2/3 ）
13.8 × 4/5 + 8 × 11/5
14.31 × 5/6 – 5/6
15.9/7 - （ 2/7 – 10/21 ）
16.5/9 × 18 – 14 × 2/7
17.4/5 × 25/16 + 2/3 × 3/4
18.14 × 8/7 – 5/6 × 12/15
19.17/32 – 3/4 × 9/24
20.3 × 2/9 + 1/3
21.5/7 × 3/25 + 3/7
22.3/14 ×× 2/3 + 1/6
23.1/5 × 2/3 + 5/6
24.9/22 + 1/11 ÷ 1/2
25.5/3 × 11/5 + 4/3
1,11/27,28/3,41/4,255/16,5/9,1/5,10/9,25/3,1/3,13/14,7,24,25,11/21,6,7/4,46/3,1/4,1,18/35,13/42,87/90,5/11,5
30 mixed operations of fifth grade scores
fast
1.125*3+125*5+25*3+25 2.9999*3+101*11*(101-92) 3.(23/4-3/4)*(3*6+2) 4. 3/7 × 49/9 - 4/3 5. 8/9 × 15/36 + 1/27 6. 12× 5/6 – 2/9 ×3 7. 8× 5/4 + 1/4 8. 6÷ 3/8 – 3/8 ÷6 9. 4/7 × 5/9 + 3/7 × 5/9...
Mixed operation of fifth grade scores
1. 3/7 × 49/9 - 4/3 2. 8/9 × 15/36 + 1/27 3. 12× 5/6 – 2/9 ×3 4. 8× 5/4 + 1/4 5. 6÷ 3/8 – 3/8 ÷6 6. 4/7 × 5/9 + 3/7 × 5/9 7. 5/2 -（ 3/2 + 4/5 ） 8. 7/8 + （ 1/8 + 1/9 ） 9. 9 × 5/6 + 5/6 ...
Give me 10 mixed fraction problems!
1.3/7 × 49/9 - 4/3 2.8/9 × 15/36 + 1/27 3.12× 5/6 – 2/9 ×3 4.8× 5/4 + 1/4 5.6÷ 3/8 – 3/8 ÷6 6.4/7 × 5/9 + 3/7 × 5/9 7.5/2 -（ 3/2 + 4/5 ） 8.7/8 + （ 1/8 + 1/9 ） 9.9 × 5/6 + 5/6 10.3/4 ×...
The concept of mixed operation of rational numbers
We hope to adopt the formula (1) the addition rule of rational numbers: 1. Add two numbers with the same sign, and take the same sign, and add the absolute value; 2. Add two numbers with different signs, and take the sign of the larger absolute value, and subtract the smaller absolute value with the larger absolute value; 3
Can all mixed operations of rational numbers be converted into addition or multiplication
20
emergency
According to the "double variable" principle, the minus sign is in front of the bracket, and the minus sign is changed into the plus sign. The positive in the bracket becomes negative, and the negative becomes positive. Dividing by a non-zero number is equal to multiplying by the reciprocal of the number
Why is the rule of removing brackets for solving equations the same as that for rational numbers
What's the puzzle? Originally, the letters in the equation also represent numbers, so as long as the brackets are removed, the rules are the same. And they are suitable for all the numbers or formulas you will learn in the future
Rational number to remove brackets arithmetic topic
Because the meaning of ascending - 2 degree is opposite to ascending 2 degree, ascending - 2 degree means descending 2 degree, that is, subtracting - 2 is equal to adding 2, for example: 5 + (- 2) =, which can be extended to? A + (- b) =
Because the meaning of decreasing - 2 degree is opposite to decreasing 2 degree, decreasing - 2 degree means increasing 2 degree, that is, subtracting - 2 equals to adding 2, for example: 5 - (- 2) =, generalization can get? A - (- b) =
The positive sign in front of a number can be omitted, such as 5 + (+ 2) =, 5 - (+ 2) =, which can be generalized to a + (+ b) =, a - (+ b)
（+8）+（-3）= （+8）-（-3）= （-8）+（-3） （-8）-（-3）
a+（-b）=a-b a-（-b）=a+b
5+（+2）= 7 5-（+2）= 3 a+（+b）= a+b a-（+b）=a-b
（+8）+（-3）= 5 （+8）-（-3）=11 （-8）+（-3）= -11 （-8）-（-3）=-5
What is the definition of rational number
Integers and fractions are called rational numbers. Any rational number can be written as fraction M / N (m, n are integers, and N ≠ 0)
Infinite acyclic decimals and numbers with open roots are called irrational numbers, such as π, 3.1415926535897932384626
The rational number is just the opposite. Integers and fractions are called rational numbers
RELATED INFORMATIONS
- 1. What is the exact definition of rational number? In the chapter of rational numbers in grade seven, the following questions are not clear: 1. Positive numbers, negative numbers and 0 are all called rational numbers. π is a positive number, but it is not a rational number, 2. Integers and fractions are called rational numbers. 0.999... Can't be converted into exact fractions, but it's rational numbers, 3. Integers and circular decimals are collectively called rational numbers. I think it's more accurate. Why don't we say that in textbooks? If the examination of such a judgment question: positive numbers, negative numbers and 0 collectively referred to as rational numbers or integers, scores collectively referred to as rational numbers. I judge whether it is right or wrong?
- 2. The meaning of three tenths minus two fifths is that we know that two addends () are three tenths and one of them is () to find another addend emergency
- 3. What are the true fractions with denominator 6, and what are the false fractions with numerator 6
- 4. A fraction whose numerator is larger than the denominator is a false fraction___ (judge right or wrong)
- 5. A fraction plus a fraction is one fourteenth Two scores cannot be repeated
- 6. How to calculate all prime numbers within 100
- 7. All prime numbers within 100 fast
- 8. Which numbers within 100 are the product of three prime numbers? Such as the title different
- 9. What is the sum of the largest prime number and the smallest composite number within 100______ The difference is______ ．
- 10. Prime number of 100
- 11. When Xiao Zhang calculates the division with remainder, he takes the divisor 113 as 131, and the result quotient is 3 more than the original, but the remainder is exactly the same, so the remainder of the problem is () A. 、4B. 5C. 6D. 7
- 12. Fill in the plus sign, minus sign, multiply sign and divide sign in each box to get the correct answer. The result of the three formulas is the same. Can you work it out? 6 7 7 3 1＝? 7 4 3 2 6＝? 8 3 6 4 2＝?
- 13. Fifth grade summer homework Science Find an empty sprite bottle and put it flat on the table. Then do the following experiments (1) Hold the empty bottle by the neck with one hand and pick it up (2) Fill the sprite bottle with water, hold the neck of the bottle with one hand (keep the outside dry) and pick up the bottle (3) Fill the sprite bottle with water, hold the neck of the bottle with one hand (the outside is wet), and pick up the bottle (4) Fill the sprite bottle with water, hold the neck of the bottle with one hand (soap on the outside) and pick up the bottle Comparing the four experiments, what does your hand feel like? What does it mean?
- 14. In the figure below, the distance between the two points is 1cm. To connect several points, get a square with an area larger than 1cm and less than 4cm, and calculate the area, as shown in the figure ... ... ... (period is dot) I know that, but how can I get the area
- 15. Chicken and rabbit are in the same cage, with 45 heads on the top and 126 feet on the bottom?
- 16. 100 exercises for solving binary linear equations It's 40
- 17. Calculation of mathematical equations A factory has stored 50 tons of coal. Due to the improvement of furnace and coal-burning technology, 2 tons of coal can be saved every day, and the stored coal can be used for 20 days more than the original plan. How many tons of coal is the original plan to burn every day?
- 18. 1. Positive fraction, negative fraction are collectively referred to as (), integer and fraction are collectively referred to as () 2. Simplify the symbols of the following numbers: -（+6）= -（-3）= +（-5）= 3. Judgment: Rational numbers include positive numbers and negative numbers Both finite decimal and infinite circular decimal are rational numbers 2 2 3 3 A = B, but not necessarily a = B. () 4. Selection: The following statements are correct A. Positive and negative numbers are called rational numbers B. there is the smallest positive rational number C. There is no maximal positive rational number d. There is no maximal negative rational number D Please solve and answer in 30 minutes. Please refer to the sixth grade mathematics exercise book unit 1 of pep_ ∩)o
- 19. PEP sixth grade mathematics exercise book Volume I answers page 8
- 20. 1. The perimeter of a rectangular piece of land is 268 meters, 32 meters longer than the width, and how many meters is the length? (equation solution) 2. A clothing factory bought a batch of 750 meters of cloth, and after processing for a period of time, the remaining meters are two-thirds of pants, four fifths of tops, and how many meters are used for tops and pants? (equation solution)