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The multiplier is 10, the product is 630 more than the multiplicand, the multiplicand is______ ．
Suppose the multiplicand is x, then the product is 630 + X. according to the meaning of the question, we can get the equation: 10x = 630 + X, & nbsp; 9x = 630, & nbsp; X = 70, answer: the multiplicand is 70
Add two addends to get 594. One of the addends has 0 at the end. After removing 0, it is the same as the other addend. What are the two addends?
54 and 540
594\(1+10)=54
54*10=540
Write complete, multiply sign with X,
1、 It's easy to judge
(1) The Pi of the big circle is greater than that of the small circle
(2) π is two decimal places
(3) If the radius of a circle is doubled, its circumference is doubled
(4) The circumference of a wheel is the distance it takes for a wheel to roll a circle
(5) The circumference of a semicircle is half the circumference of the circle plus its diameter
2、 Fill in the blanks
(1) The figure formed by turning the tip of the minute hand of the clock for one circle is ()
(2) The circumference of a circle is () times the diameter of the same circle
(3) The ratio of radius to diameter of a circle is (), and the ratio of circumference to diameter of a circle is ()
(4) The radius of the small circle is 6cm, and the radius of the compound is 9cm. The ratio of the diameter of the small circle to the diameter of the large circle is (), and the ratio of the circumference of the small circle to the circumference of the large circle is ()
(1) How many meters is the length of the wire?
(2) The outer diameter of a bicycle tire is 60dm. If it turns 100 cycles per minute, how many minutes does it take to cross a 3000m long bridge
(3) There is a round lawn with a circumference of 62.8m, which is ready to be installed with automatic rotary sprinkler irrigation device for sprinkler irrigation. There are three kinds of devices with a range of 20m, 15m and 10m. Which one do you think is more suitable? Where is it installed?
1、 It's easy to judge
(1) The Pi of the big circle is greater than that of the small circle
(2) π is two decimal places
(3) If the radius of a circle is doubled, its circumference is doubled
(4) The circumference of a wheel is the distance it takes for a wheel to roll a circle
(5) The circumference of a semicircle is half the circumference of the circle plus its diameter
2、 Fill in the blanks
(1) The figure formed by turning the tip of the minute hand of the clock for one circle is ()
(2) The circumference of a circle is () times the diameter of the same circle
(3) The ratio of radius to diameter of a circle is (), and the ratio of circumference to diameter of a circle is ()
(4) The radius of the small circle is 6cm, and the radius of the compound is 9cm. The ratio of the diameter of the small circle to the diameter of the large circle is (), and the ratio of the circumference of the small circle to the circumference of the large circle is ()
3、 Solve the problem
(1) How many meters is the length of the wire?
(2) The outer diameter of a bicycle tire is 60dm. If it turns 100 cycles per minute, how many minutes does it take to cross a 3000m long bridge
(3) There is a round lawn with a circumference of 62.8m, which is ready to be installed with automatic rotary sprinkler irrigation device for sprinkler irrigation. There are three kinds of devices with a range of 20m, 15m and 10m. Which one do you think is more suitable? Where is it installed?
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