( 1) 125×72= 125×8×9 ( )

(2)25×4÷25×4= 100÷ 100= 1 ( )

(3) 125- 125×8=0×8=0 ( )

(4)25× 13×4=25×4× 13 ( )?

Second, choose.

(1)25× 12, which is calculated by a simple method as ().

①25×3×4 ②25×4×3 ③25×6×2

(2) If A × 3 = B, the following statement is incorrect ()

(1) b number is not equal to 0; 2 b divided by 3, the quotient is a; The number b is three times that of a.

(3) The product of a number multiplied by 30 is () times that of a number.

① Uncertainty; ②30 times ③ Number of nails× 30?

Third, simple calculation. ?

( 1)36×25 (2)8× 13× 125 (3)25×7×4

Fourth grade arithmetic and simple calculation exercises

First, judge the problem.

1、27+33+67=27+ 100? (? ) 2、 125× 16= 125×8×2? (? )

3、 134-75+25= 134-(75+25)? (? )

4. Multiply the first two numbers, or multiply the last two numbers first, and the product remains unchanged. This is the law of multiplication and association. ()

5、 1250÷(25×5)= 1250÷25×5(? )

Second, choose (put the serial number of the correct answer in brackets) (8 points)

1, 56+72+28=56+(72+28) Use ().

A, additive commutative law b, additive associative law c, multiplicative associative law d, additive commutative law and associative law.

2、25×(8+4)=(? )A、25×8×25×4？ b、25×8+25×4？ c、25×4×8？ d、25×8+4

3. Is it 3×8×4×5=(3×4)×(8×5)? ()

A, multiplicative commutative law b, multiplicative associative law c, multiplicative distributive law d, multiplicative commutative law and associative law

4、 10 1× 125=? ()A、 100× 125+ 1B、 125× 100+025 c、 125× 100× 1D、 100× 125× 125

Third, how to calculate how simple (35 points).

355+260+ 140+245 102×992× 125? 645- 180-245? 382× 10 1-382?

4×60×50×8? 35×8+35×6-4×35 125×3225×46 10 1×56? 99×26

1022-478-422987-(287+ 135)? 478-256- 144? 672-36+64? 36+64-36+64

487-287- 139-6 1500-257-34- 143? 2000-368- 132? 18 14-378-422

89×99+89? 155+264+36+4425×(20+4)? 88×225+225× 12? 698-29 1-9?

568-(68+ 178)56 1- 19+58382+ 165+35-82? 155+256+45-98236+ 189+64

759- 126-25925×79×4569-256-442 16+89+ 1 157× 125×8? 1050÷ 15÷77200÷24÷30

2 19? ×99? 37? ×98? 58? × 10 176? × 10278×46+78×54? 169× 123-23× 169? 37×99+37?

129× 10 1- 129? 149×69- 149+ 149×32? 56×5 1+56×48+56 125×25×32? 24×25

125×48? 5 14+ 189-2 14369-256+ 156732-25456×25×4× 125? 24×73+26×24

16×98+32? 5 12+(373-2 12)? 228+(72+ 189) 169+ 199? 109+(29 1- 176)

Fourth, the application problem. (14)

1 chengxiong mall 1-4 sold 269, 67, 33 1 and 233 refrigerators respectively. How many refrigerators did Cheng Xiong Shopping Center sell in the whole year?

2. The heights of the six players in the third group are 128 cm, 136 cm, 140 cm, 132 cm, 124 cm and 127 cm respectively. What is their average height?

V. Application Problems (3 1 min)

1. A flour mill grinds 800 kilograms per hour. According to this calculation, how many kilograms of flour can six flour mills grind in five hours? (Answer in two ways)

2. A pile of coal is 800 tons, and five trucks can transport it 16 times. How many tons can each truck transport on average?

The car travels 300 kilometers in 6 hours and the train travels 600 kilometers in 6 hours. How many kilometers does the train travel more than the car per hour?

4. The meteorological team of Xiangyang Primary School measured the highest daily temperature in a week: 365, 438+0, 365, 438+0, 34, 32, 33, 30 and 33 degrees respectively. What is the highest average temperature this week?

Two, column calculation (20 points)

1.96 minus 35 times the sum of 63 and 25. What is the product?

What is the difference between the quotient of 2.2727 divided by 9 and the product of 36 and 43?

What is the quotient of the difference between 3.3 and 9 divided by the sum of 336 and 474?

4. A number is 36 more than the product of 96 and 308. Find this number.

5. What is the product of the sum and difference between the largest two-digit number and the smallest three-digit number?