2. Every time 3× 4 = 12, 3 and 4 are all factors of 12. ( )

3. To test whether the product is correct, you can divide the product by one factor to see if it is equal to another factor. ( )

4. In the four operations with brackets, you should count in brackets first, and then count in brackets. ( )

5. Have ()

6. Subtraction is the inverse of addition and division is the inverse of multiplication. ( )

7. The sum known in subtraction is called the minuend ()

8.41+72+59 = (41+59)+72 Only additive associative laws are used. ( )

9. There are five Sundays in September. If September 1 is not Sunday,

Then today must be Saturday. ( )

10, Xiaohong is 20 years younger than his father small 8 this year, and eight years later, Xiaohong is 20 years younger than his father. ( )

1. 125×8÷ 125×8= 1 ( )

2. The smallest natural number is 0. ()

3.48 can only be divisible by 6. ()

The school playground covers an area of 48,000 square decimeters. ()

5. Remove the zero after the decimal point, and the size of the decimal point remains the same. ()

6.9300÷500= 18……3 ( )

7. The decimal counting unit is the same as the integer counting unit, and the ratio between every two adjacent units is 10. ()

8. Multiply 0 by any number to get 0. ()

9. 1 in percentile is 1 0000 times of1in percentile. ()

1. Two disjoint lines are called parallel lines. ()

2. Line A is perpendicular to line B, and both lines A and B are called perpendicular lines. ()

3. Two triangles with the same base and height may have different shapes. ()

4. Two groups of parallelograms with parallel opposite sides are called parallelograms. ()

5. Enlarge 7.68 by 1000 times, and just add three zeros at the end. ()

6.9465700 The approximate figure in billions is 65438+ billions. ()

1. Both internal angles of the triangle are acute, so this triangle must be acute. ()

2. An equilateral triangle must be an acute triangle. ()

3. Two triangles with equal areas can be combined into a parallelogram. ()

Only one line segment can be drawn between point a and point b. ()

5. Only one ray can be drawn from one point. ()

6. The longer the side of an angle, the bigger the angle. ()

7. The intersection of two straight lines is called vertical foot. ()

8. Two trapezoids with equal areas can be combined into a parallelogram. ()

9. Because the sum of the interior angles of a triangle is 180, the sum of the interior angles of a parallelogram is 360. ()

1. Century is the unit for calculating age, and one hundred years is a century. ()

2.9: 00 15 is 9: 00 1 quarter. ()

3. 13 8: 00 =300: 00 ()

On February 29th, Zhang Lei flew to Singapore. ()

1.0 is divided by any number to get 0 ().

2.758+396=758+400-4 ( )

3.596-98=596-98-2 ( )

4.72×(38+42)=72×38+42 ( )

5.900÷700=9÷7= 1……2 ( )

6. 1456-(324+456)= 1456-456-324 ( )

7.54÷(3+6)=54÷3+54÷6 ( )

8. Because A-8=B-6, A > B ()