Beijing normal university printing plate fourth grade mathematics first volume unit 4 examination paper
First, fill in the blanks.
Operation sequence of 1. mixed operation: in an expression without brackets, there are addition, subtraction, multiplication and division, so () should be calculated first, and then (); In the formula with brackets, calculate () first, then (); There are parentheses and brackets, so count () first, then ().
2. Calculation (76-24)? (15+26), method () and method () should be calculated at the same time, and then method () should be calculated.
3. Fill in the appropriate numbers in the box to make this formula easy to calculate.
? 57+57? 56 176+87+
? -99? 72 36? 52+ ? Fifty two
Second, the judgment question. (to the painting? , wrong painting? )
1.202? 45=200? 45+2 ( )
2. 18? 45+ 18? 55= 18? (45+55) ( )
3.96? ( 10 1- 1)=96? 10 1-96 ( )
4. 125? 32? 25= 125? 8+25? 4 ( )
5.36? 18+36? 12=36? ( 18+ 12) ( )
6. Using the algorithm can definitely make the calculation easier. ( )
Third, multiple choice questions. (Put the serial number of the correct answer in brackets)
1.204? The simple algorithm of 25 is ().
A.200+4? 25
B.200? 25+4? 25
C.200? (4? 25)
2.36? 4? The simple algorithm of 5 is ().
A.36? (4? 5)
B.(36+4)? five
C.(36? 4)? five
3. In the following formula, () applies the multiplicative associative law.
A.48+62+38=48+(62+38)
B.34? 125? 8=34? ( 125? 8)
C.37+63? 4=(37+63)? four
4. Remove the brackets, and the formula with the same number is ().
A.32? ( 15? 7)-2 14
B.32? ( 15+7)-2 14
C.32? ( 15-7)-2 14
5. Using () can make (125? 99+ 125)? 16 simple operation.
A. Multiplicative associative law
B. law of multiplicative distribution
C. Multiplicative associative law and multiplicative distributive law are used at the same time.
Fourth, the calculation problem.
1. Write directly.
88-28? 4= (49-49)? 49=
32? 2? 8= 40+200? 5=
125? 80= 154-54=
2. Use a simple method to calculate.
204? 15 72? 99+72
5? 38? 4? 5 125? 79
67? 10 1-67 63? 99
Fifth, solve the problem.
1. The bicycle factory has assembled a batch of bicycles. It was originally planned to install 25 bicycles every day, which would take 40 days to complete. Due to the improvement of efficiency, it was actually completed in 8 days. How many cars are actually loaded every day?
2. Buy one of the following three kinds of balls. How much is a ball?
Yongfa Supermarket sent 4 boxes of towels, each containing 5 towels. How many towels did a * * * send?
Master and apprentice process a machine part at the same time. The master processes 42 pieces per hour and the apprentice processes 25 pieces per hour. After 4 o'clock, how many parts did the master and apprentice process?
The school has equipped 8 classes with drinking fountains and wastepaper baskets. How much did it cost?
6. There are 84 people in the choir. How many times are there more choirs than art groups?
Beijing normal university printing plate fourth grade mathematics first volume unit 4 examination paper answer
1. 1. Multiplication, division, addition and subtraction.
Outside the brackets, inside the brackets, inside the brackets.
Subtraction, multiplication and multiplication
3.44 24 99 172 64 (the answer is not unique)
Second, 1. 2.? 3.? 4.? 5.? 6.?
Three. 1.B 2。 A 3。 B 4。 A 5。 C
Four. 1.8 1 0880 10000 100
2.3060 7200 3800 9875 6700 6237
Verb (abbreviation of verb) 1.25? 40? 8= 125 (vehicle)
2.64+78+36= 178 (yuan)
3.4? (22? 5)=440 (strips)
4.(42+25)? 4=268 (pieces)
5.( 125+5)? 8= 1040 (yuan)