A
work rate = ()/()
work amount/work time
in 88 x 125 = 8 x 125 +125 x 80 which law of multiplication is used?
the distributive law
Name the first three group levels of counting in China.
1...ones group; 2... ten thousands group; 3... hundred millions group
A straight angle is twice a ( ) angle and half of a ( ) angle.
right, full
With the denominator of 9, there are how many fractions greater that 5/9 but less than 9/9?
3
There are 6 points on the circumference of a circle. A line segment can be drawn by joining any two of these points, How many line segments can be drawn at the most?
15 line segments
1 square kilometer = () square meters
1 000 000 square meters
Julie and Mia started walking from a library to school at the same time. It took Julie 2/5 hours and Mia 2/4 hours. Between the two, who walked faster?
Julie walked faster.
26 tons and 30 kilograms = ()kilograms
26,030 kilograms
The product of a multiplication sentence is equivalent to the dividend, divisor, or the quotient?
dividend
Make 24 with the numbers 2,7,1, and 7.
(7 x 7 - 1) ÷ 2 = 24
When rounding down 38,74__,017 to get to 38,740,000... __ can be filled in with...
0 through 9
Round up the number to the whole millions: 5,210,178,900 and round down the number to the whole ten thousands: 1,094,507,260
5,211,000,000; 1,094,500,000
If a number is rounded to the nearest million, it is 5,000,000. The greatest possible value of this number is ____ and the least possible value is _____.
5,499,999; 4,500,000
Put brackets in the following number sentence to make the equation true. 480 - 360 ÷ 12 + 8 = 6
(480-360)÷(12+8)=6
If a multi-digit number has a ten thousands group and a ones group, then it is at least a...
A) four-digit number
B) five-digit number
C) six-digit number
D) seven-digit
B) five-digit number
Calculate 90 ÷ 3 x 5 - 5, and then try to use brackets to change the result of the calculation. How many different results can be obtained?
3; 90÷(3x5)-5=1; 90÷3x(5-5)=0; 90÷(3x5-5)=9
Combine these three number sentences as three steps into a mixed number sentence: 247 - 82 = 165; 165 x 2 = 330; 660 ÷ 330 = 2
660÷[(247-82)x2]=2
Use set square triangles to draw two angles so they are equal to 120 degrees and 75 degrees respectively.
(see drawing)
The winning number of a sports lottery round is a 6-digit number. The three digits on the left are all the same. The right three digits are the least consecutive positive whole numbers, from the right to the left. The sum of the 6 digits equals the two-digit number at the end of the number (from left to right). Do you know what that round's winning number is?
555,321
Some pomegranates are growing on a tree. If 7 is subtracted from the number of pomegranates, then the difference is multiplied by 7, then 7 is added, and finally the sum is divided by 7, the result is 7. Can you work out how many pomegranates are growing on the tree?
(7x7-7)÷7+7=13 pomegranates
In one day, 24 hours, the minute hand turns how many degrees?
24 x 360 = 8640
Can set squares be put together to form angles 75, 105, 125, 135, 155? Yes or No
yes, yes, no, yes, no
How many zeros are at the end of the product 1 x 2 x 3 x 4 x 5 x...x 28 x 29 x 30.
7 zeros
A rectangular vegetable plot is 45 meters long and 32 meters wide. Now the length is to be increased by 13 meters and the width by 12 meters. How many square meters is the plot to be increased by?
1,112 square meters