13 +47 +23 + 17 =60+40= 100

45 ×38 ×59 = 100890

10 1× 17 - 17 = 17 ×( 10 1- 1)= 17 × 100= 1700

647 ×48 =3 1056 17 ×34×7×2 17 =877982

What is the sum of the difference between13 and 14 plus their products? What is the product of 9 and its reciprocal multiplied by 79?

①( 13- 14)+ 13× 14= ②(9+ 1/9)×79

Fill in the blanks: (2 points × 18=36 points)

1, 45 ×7 (7 45 plus or 45 7 plus); 45 ×34 means (same as the previous question).

2.35 hours = (60× 35) minutes 58 kilograms = (58,000) grams.

3. The reciprocal of the smallest prime number is (1/2), and the reciprocal of 0.25 is (4).

4、 16 ×( 1/ 16)=7 13 ×( 1/7 13)= 17 13 -( 17 12 )=( 10/3)×0.3 = 1

5. The weight of a pile of sand is 1, 5 16 tons, 25% is used, 379 tons are used, and the remaining 75% (self-filled).

6. The number of boys in the sixth grade is 7 10 of the number of girls, so the number of boys accounts for as much as () () of the whole grade. Can not do

At the beginning of the new semester, students should choose a squadron leader. Of the ***60 people who participated in the election, 3/5 agreed with Xiaoming, 7 10 agreed with Xiaohong and 5/6 agreed with Xiaodong. The one with the least votes is (), not (). Can not do

8. Right: It's a bunch of discs. If 3/4 of them are painted red, they need to be painted red () disks; If you take 4 chips and color the remaining 3/4 chips red, you need to color () chips red. Can not do

9. It is known that A× 67 = B× 65 = 55× C, where a, b and c are natural numbers and all are not zero. Arrange a, b and c in descending order: a < b < c.

1, only column types are not calculated:

① The distance between Party A and Party B is100km. A car walked 4/5 of the whole journey. How many kilometers has it traveled?

100×4/5

② The number A is 56, the number B is 65438+ 0/7 of the number A, and the number C is 65438+ 0/8 of the number A. What is the number C?

56× 1/8

(3) There are 480 orchards, including 20 peach trees, accounting for more than 3/8 of the total. How many?

480×3/8+20

2. Nanjing Yangtze River Bridge is about 6800 meters long, and Wuhan Yangtze River Bridge is equivalent to its 1/4. How many meters is Wuhan Yangtze River Bridge?

6800× 1/4

3. The fifth grade students collected 56 kilograms of tree species, and the sixth grade collected 4/7 more than the fifth grade. How many Jin did the sixth grade earn more than the fifth grade? 56×4/7

4. A rectangular iron plate is 6m long and 1/3 wide. What is the area of this iron plate? What's the circumference?

Area: 6× (6×1/3) (6+6×1/3) × 2.

5. A batch of cement used 12 tons, and the rest used 5/9. How many tons is this batch of cement?

12+ 12×5/9

6. Yihua Computer City has 220 computers. On the first day, 1/4 was sold, and on the second day, 4/5 was left. How many computers did it sell the next day? 220×( 1- 1/4)×4/5

7. The restaurant bought 78 tons of flour, and used 3/4 of this batch of flour on the first day, 3/6 tons on the second day, and 78×3/4+3/6 tons of flour on two days.