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Given AXB = 280, if a expands 3 times and B remains unchanged, then the product is (); if B shrinks 5 times and a remains unchanged, then the product is (); if a expands 5 times and B also expands 5 times, then the product is ()
840,56,4200
It is known that a × B = 380. If a is expanded three times, then the product is______ If B is reduced by 5 times, then the product is______ ．
Therefore, the answer is: 1140, 76
The product of two numbers is 70. One factor is expanded by 100 times, and the other factor is reduced by 10 times______ ．
According to the change law of the product, the product of two numbers is 70. If one factor is expanded by 100 times and the other factor is reduced by 10 times, the product will be expanded by 100 △ 10 = 10 times and 70 × 10 = 700
RELATED INFORMATIONS
- 1. When two numbers are multiplied, one factor is reduced by 10 times, and the other factor is increased by 20 times. Their product is the original______ Times
- 2. The product of the two factors is 3.45. If one factor is expanded by eight times and the other factor is reduced by one third, what is the product now?
- 3. When two numbers are multiplied, one factor is expanded by 8 times and the other factor is reduced by half, and the product is 360, then the original product is 360________ . (with explanation)
- 4. The product of a number (except 0) multiplied by a true fraction () is a number. A. greater than. B. less than. C. equal to. Speed
- 5. It is known that a * b = 380, if a is expanded to 3 times of the original, then the product is (); if B is reduced to 1 / 2 of the original, then the product is ()（ It is known that a * b = 380, if a is expanded to 3 times of the original, then the product is (); if B is reduced to 1 / 2 of the original, then the product is ()（
- 6. A number plus 52.2 times 52 plus itself minus 2.5% of 400 is exactly 2740. What's the number
- 7. M and N are reciprocal. The sum of the product of M and N and X is 25 / 7. What is x?
- 8. 0 × (- M) = (), m × 0 = () (- 1 / 3) × 3 / 7 = (), (- 3 / 16) × (- 16 / 9) = () (- 5) × (1 + 1 / 5) = (), X · 1 / x = () (x ≠ 0) 7 of 8 × (- 3 of 10) × 0 × (17 of 19) = () A > 0, B < 0, then AB 0 (greater or less than)
- 9. Given that the product of a's Square plus BC is 14, the product of B's Square minus 2 times BC is - 6, find the product of 3 times a's Square plus 4 times b minus 5 times BC
- 10. How much is four quarters minus one sixth? How much is three quarters plus three tenths?
- 11. The product of two numbers is 70. One factor is expanded to 100 times of the original, and the other is reduced by one tenth. The product is 70
- 12. If the product of two factors is 80, one factor is reduced by 8 times, and the other factor remains unchanged, then the product is ()
- 13. A △ 6 / 7 = B × 6 / 5 = C × 5 / 6, where ABC is a natural number and is not zero, the three numbers of ABC are arranged in the order from small to large
- 14. Fill in the blanks 1. If seven a equals eight B equals nine C (ABC is not equal to 0), then a + B-C a + B + C equals () 2. The hour hand and minute hand form a () angle at two o'clock, and the hour hand and minute hand form a flat angle at two o'clock. Every hour, the angle that the minute hand turns is () angle. 3. It takes a quarter of an hour and a sixth of an hour to process the same kind of parts. The efficiency of the work of a and B is six pages less than () 4. Xiao Ming read a book and read a quarter of the whole book on the first day, There are still four fifths left. He should look at it from page () the next day. 5. The last step of a calculation problem should be to divide by ten, but a careless student wrongly multiplied by ten in the last step. His answer is 500. The correct answer to the original problem should be () 6, a = 2 * 3 * m, B = 3 * 5 * m (M is a natural number and M is not 0), Then M is () 7. When a bottom edge of the trapezoid is gradually shortened to a point, the trapezoid becomes () shape. When a shorter edge of the trapezoid is gradually extended to be equal to the other edge, the trapezoid becomes () shape. 8. Use 1260 square cubes with 1 cm edge length to pile up a cuboid, in which the difference between the largest and smallest surface area is () square centimeter?
- 15. It is known that a × 4 / 3 = 11 / 12 × B = 5 / 5 × C, and ABC is not equal to 0. Please arrange the three numbers of ABC in descending order and explain why they are arranged in this way
- 16. What's the solution of one fifth plus x equals nine twentieth
- 17. Is the triangle with EA equal to 5 / 4, B equal to 3 / 4, C equal to e a right triangle
- 18. Let the lengths of the three sides of a right triangle be a, B and C respectively. If C-B = B-A > 0, then C-A of C + A is equal to? Second grade mathematics multiple choice questions! A. One half B. One third C. A quarter D. One in five
- 19. 1. If a = two-thirds of B, and a is not equal to 2, then A-B + 1 of a + B-5 is equal to? 2. Given 1 / X-1 / y = 3, then the value of the algebraic formula x-2xy-y 2x-14xy-2y is?
- 20. The number a is five times the number B. if the number a plus 4 and the number B minus 1.6, then the number a is five times the number B