Elementary school grade one mathematics volume 2 unit 8 examination paper topic
First, write directly.
60+30= 88-5= 6+20= 32+22= 7 1-3=
45+20= 52-30= 5+37= 42+8= 33+42=
80+20= 25+8= 36+7= 47+50= 39+40=
83-9= 46-7= 45-5= 97-50= 44-40=
Second, use vertical calculation.
28+54= 70-25= 80-27-23=
83- 16= 36+55= 65+ 17-59=
Third, fill in the blanks.
1, measuring the length of a shorter object, you can use () as the unit, measuring the length of a longer object, usually using () as the unit.
2. The big square on the student's ruler indicates () centimeters, from? 0? Arrive? 4? Is it () cm, from? 7? Arrive? 15? It's () centimeters.
3. When measuring an object, aim the left end of the object at the scale () of the ruler, and there are several scales () pointed at the right end.
4. On the meter scale, from scale 0 to scale 100 is () cm, that is ().
5. Do the math.
1 m = () cm 300 cm = () m
5m = () cm 1m-20cm = () cm
8m+40m = () m 63m-40m = () m
50 cm +30 cm = () cm
24 cm -9 cm = () cm
97 cm +3 cm = () cm = () m
3 m 70 cm -40 cm = () m () cm
7 m 40 cm -4 m = () m () cm
4. Fill in ()? Rice? Or? Centimeter? .
Pencil length 18 () Bed length 2 ()
Palm width 7 () Blackboard length 4 ()
The building is 40 () high, and the classroom door is about 2 ()
Sister's height is 98 () flagpole 15 ()
Xiaohong is 1 () 25cm tall and the playground is 140 () long.
Skipping rope length 2 () Key length 5 ()
This table is 70 feet high and this tree is 5 feet high.
5. fill in ○? & gt？ 、? & lt？ Or? =? .
25cm 2m 1 00cm15m 5 1 cm 49cm
98m ○ 89m，50cm ○ 5m，33cm ○ 3m。
5m 6m 8m 8cm 90cm 1 m
60 cm 6 m 30 cm 3 m 1 m 99 cm
150cm ○ 1 m 50cm 60m 60cm
18m-8m○ 10m 1m-60cm○50cm
Sixth, solve practical problems.
1. The worker's uncle built a 95-meter-long road, and there were still 36 meters left after a day's repair. How many meters were repaired this day?
The garment factory delivered 46m white cloth and 39m printed cloth. How many meters are printed cloth and white cloth?
Key points of mathematics review in grade four
Understanding of 1 and 1 100 million;
10 ten thousand is one hundred thousand, 10 ten thousand is one million, 10 one million is ten million, 10 ten million is one hundred million.
Summary: What is the propulsion rate between two adjacent counting units? Ten?
2. How to read numbers within 100 million:
Summary: ① Start from a high position and read down one level at a time.
(2) Ten thousand series should be read according to the reading method of single series, and then a ten thousand word should be added at the back.
No matter how many zeros there are at the end of each level, don't read them. All other digits have one? Zero? Or several times in a row.
Answer? Zero? Read only one book? Zero? .
3. How to write numbers within 100 million:
Summary: ① Start from the advanced level and write it down level by level.
(2) When there is no counting unit on any bit, write 0 on that bit.
4. Compare the numbers within 1 100 million:
Summary: ① When there are many digits, this number is relatively large.
(2) When these two numbers are the same, we should start from the left, that is, compare them from the highest place. The higher the number at the top, the higher the number.
(3) If the number on the highest bit is the same, compare it with the next bit, and so on, until we compare the number on the same bit, which number is larger, we can conclude that this number is larger.
5、? Wan? Number of units:
Summary: Sometimes, in order to facilitate reading and writing, we rewrite the integer as "you"? Wan? Do the number of units.
6. Find out the approximate figures:
Summary: This method of finding the divisor is called? Rounding method? , is it? Give up? Or? Become? , to
See if the highest digit of the omitted mantissa part is less than 5 or equal to or greater than 5.
7. Indicates the number of objects: 1 2 3 4 5 6. There is no object in the natural number: it is represented by 0. 0 is also a natural number.
The smallest natural number is 0. There is no maximum natural number, and the number of natural numbers is infinite.
8. Decimal counting method: the progress rate between every two adjacent counting units is ten. This counting method is called decimal counting method.
9. How to pronounce the number of more than 100 million:
Summary: Numbers above 100 million are also read from high places, one level at a time, zeros at the end of the stage are not read, and only a few zeros in the middle are read.
Lecture notes on math review for grade four
1, know the integer thousand (memory: 10 thousand is ten thousand)
2. Read and write numbers (write Chinese characters when reading and Arabic numerals when writing numbers).
No matter whether there is a zero or several zeros at the end of a number, this zero will not be read.
② There is a zero or two consecutive zeros in the middle of a number, and both of them read only one zero.
3. Comparison of figures:
① Numbers with different digits are larger, and those with more digits are larger.
(2) Compare the sizes of numbers with the same number of digits. First, compare the figures in the highest place of these two figures. If the digits on the highest digit are the same, compare the next digit, and so on.
4. Find the approximate value of a number:
Memory: Look at the last digit. If it is 0-4, use the four-shed method. If it's 5-9, use the decimal method.
The largest three digits are 999, the smallest three digits are 100, the largest four digits are 9999, and the smallest four digits are 1000. The largest three digits are less than the smallest four digits 1.
5, the minuend is a three-digit continuous abdication subtraction steps:
① When the columns are vertical, the same numbers must be aligned;
(2) When subtracting, which digit is not reduced enough will be1of the previous digit; If the previous digit is 0, it is 1 of the previous digit.
6. Pay attention to the middle 0 when doing the problem, because it is abdicated continuously, so you should retreat from one hundred to ten at 10, and then from ten to one at 10, and lend one, so there are only nine left in the ten, not 10. (Sum of two three digits: it may be three digits or four digits. )
7. Formula
Sum = Addendum+Another Addendum
Appendix = Sum-Another Addendum
Subtraction = minuend-difference
Negative = negative+difference