1. When calculating 2 16—25×8, the first step is to calculate _ _ _ _ _, and then the _ _ _ _ _ method, and the calculation result is _ _ _ _ _.
2. Rewrite the two formulas of 260 ÷ 260÷5 = 52470—2 10 = 260/0 = 260 into a comprehensive formula, which is _ _ _ _ _, and the result of this comprehensive formula is _ _ _.
3. Use the following numbers in descending order "
The pronunciation of 4.708600000 is _ _ _ _ _ _ _ _ _ _ _ _ _ 5. The two adjacent digits with the largest four digits are _ _ _ _ _ and _ _ _ _ _.
6. When Red Star Primary School numbers each student, it sets "1" for boys and "2" for girls. For example, in 2003, the student number of the No.24 boy in Grade Five 10 class was 0305 1024 1 22, which means that the student entered _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
7. In a subtraction formula, the minuend subtracts 30, and the minuend adds 30, and the difference is _ _ _ _ _. 8. As shown, there are _ _ _ line segments; The light emitted by a flashlight can be regarded as a _ _ _ _ _ line.
At 9.3 o'clock, the angle formed by the hour hand and the minute hand is _ _ _ _ _ _ degrees; At 7: 30, the angle between the hour hand and the minute hand is _ _ _ _ _ _ degrees.
10 、( 5 1+a)+_ _ _ _ _ _ _ = a+(_ _ _ _ _ _+39)
1 1, as shown in the known figure, ∠ 1 = 60, ∠ 2 = _ _ _ _ _ degrees (2 points).
Second, the math judge, cleverly arguing right and wrong. (Mark "√" for the right and "×" for the wrong, * * 5 points) 1, 26+74 ÷ 2 = 100 ÷ 2 = 50 ()
When we read the number 203008, we only read a 0 ().
3. An angle greater than 90 is called obtuse angle ()
4. Units, ten, hundred, thousand and ten thousand are all counting units ()
5, the length of a straight line is 5 cm ()
Happy ABC (put the serial number of the correct answer in brackets, ***5 points) 1, a number is six digits, and this number () a must be greater than 100000.
B, no more than 100 thousand
C, must be greater than ninety thousand.
2. The formula of the result equal to 453-2 1-79 is ().
a、453—79+2 1 B、453+79—2 1
c、453—(2 1+79)
For Xiao Ming, this is the shortest way to school.
a、 1
b、2 C、3
4. A pair of triangles can spell out the angle A, 46, 105 of ().
b、 180、 120
c、 135、 1 10
5. Xiao Ming makes tea for the guests, taking water 1 minute, boiling water for 6 minutes, washing teacups for 2 minutes, drinking tea 1 minute, and making tea 1 minute. Xiao Ming makes reasonable arrangements for the above things, so that it will take at least () minutes for the guests to have tea as soon as possible. A: Seven minutes.
B, eight minutes
C, 9 minutes
SJ, step by step (33 points) 1 Look at the formula and write the numbers, ***6 points) 260,000+740,000 =
625— 125= 42×5=
540÷6=
350—300= 300÷50= 15×30= 12× 1÷4=
1 1×70=
36+64÷4= 100— 17— 13=
( 10— 10)× 10=
2. Estimate, (3 points) 63248-9382 ≈ 3 60280-130600 ≈ 41789+85463 ≈ 3. Out-of-scale calculation (12 points).
185—(5 1+49)
145+22× 13
360—360÷6
3 15÷(854—845) 35×( 107—79) ( 1 1+34)× 14
4. Choose the simplest method to calculate (12) 352-98 725+363+75 613-168-13.
970—790— 1 10 203+529 185+47+53
Five, ingenuity, hands-on practice (10)
1. Draw two rays with the following point o as the endpoint. 2. Draw angles of 75 and 90 respectively.
O
Six, the use of knowledge to solve problems (22 points)
1. A car starts from Chongqing, travels at a speed of 68 kilometers per hour, and arrives in Chengdu five hours later. How many kilometers per hour if you want to arrive early 1 hour? (4 points)
China Legion won 32 gold medals in Athens Olympic Games. It is estimated that the number of gold medals in Beijing Olympic Games is 22 times less than that in Athens Olympic Games. How many gold medals did Athens and Beijing Olympic Games win? (5 points)
3. How many kilometers does this car travel per hour on average? (4 points)
4. Primary school tour (4 points)
1 2 class 3 class 4 class 5 class 6 class 48 class number 5 1 45 52 49 55
(1) If each student gives out two loaves of bread and a bottle of mineral water, will it be enough to buy 15 cases of bread and 12 cases of mineral water?
(2) You ask another math problem and work it out.
5. The travel agency has put forward two kinds of tourism price schemes, namely "one-day tour in ×× scenic spot". (5 points) Option 1:
Adult 150 yuan, child 60 yuan. Scheme 2: there are more than 5 people in the group, each of whom is 100 yuan.
(1) There are 6 adults and 4 children. How can I get a good ticket? (2) There are 4 adults and 6 children. How can I get a good ticket?