In order to help junior three students consolidate and review what they have learned in Unit 8 in time, I will sort it out for you next. Let's have a look.

I. Calculation

1. Write the number directly.

15× 4 50× 40 25× 8 289+32110,000-680,000 340+650,000 238+763 960 ÷ 4× 0 524-299168+

2. Use vertical calculation

9786 1+63 18 43700-9 104

3. Find the unknown X.

X– 1085 = 3523 56–X = 56 X+99 = 200 146+X = 368

4. How to calculate the following questions simply?

563 – 495 397+656 39 1+568+709+32 1937-672-937 1249-673+249 7589+3565+23 1 1236- 185×6 482- 188+ 1 18

5. Formula calculation

14 16 is one more number than 24 1. Did you find this number?

2 Which number and 98 add up to 136?

What is the sum of the products of 376 and 9 plus 165?

fill (up) a vacancy

1 and 98769 are both numbers, including orders of magnitude, and the highest digit is a number, which means that this number adds up to 100000.

2. 106005000 read:.

3.804040 Writing: Omit the mantissa after 10,000, and rewrite it as the middle number of 10,000.

4. Sum two numbers adjacent to 100000 respectively.

Third, the judge.

1, and the series between every two adjacent numbers is ten.

2. Different numbers of a number represent different sizes of numbers.

3. Units, ten, hundred, thousand, ten thousand, one hundred thousand, one million, ten million, one billion, one billion ... are all called counting units.

The highest digit of a number is hundreds of billions, and the number on each digit is 9, then this number is the largest natural number.

The smallest six digits are one less than the largest five digits.

Fourth, choose

1 should be filled in, in 965–398 = 965–400.02.

a 、+ B 、-

2, the meiosis increases by 50, and the meiosis decreases by 50, poor.

A, also increased by 50 B, decreased by 50 C, increased by 100 D, decreased by 100 E, the same size.

3. "There are 28 boys in class 4/kloc-0, four less than girls. How many girls are there? " The following incorrect equivalence relation is.

a、28–X = 4 B、X–28 = 4 C、X–4 = 28D、X = 28 + 4

4. 50700705, 50700750 and 500007057 are arranged in descending order.

a、507000057 & gt50700750 >50700705 B、50700705 & lt50700750 & lt507000057 C、507000057 & lt50700705 & lt50700750

5. Use 1, 6 and 3 zeros to form a five-digit number. If only one zero is read, different five digits can be formed.

a、2 B、4 C、6 D、8

Verb (abbreviation of verb) application problem

1. Xiaoming has read 250 pages in a book, and the rest is eight times as much as he has read. How many pages are there in this book?

2. The monthly output of master 13498 pieces and apprentice's monthly output is 9876 pieces. Please estimate how many parts are produced by mentoring? How many more parts does the master have than the apprentice?

In a textile factory, each worker used to weave 77 meters per hour, but now he weaves 648 meters in 8 hours. How many meters does he knit per hour more than before?

4. Build a 9700-meter-long road, 3422 meters in June, 2578 meters in February, and how many meters can be completed in March?