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Break through in Mathematics (fill in the blanks) Explanation with "*" to solve the problem 1. Fill in "" or "=" in brackets (11/21*6/7)*42( )11/21*42 (1/7+1/8)*56( )1/7+1/8*56 *2. There are 540 boys in Yuhong primary school, 2 / 9 more girls than boys, and () more girls than boys *3. From 3 / 4 tons of cement, 2 / 5 tons are transported, and () tons are transported; from 3 / 4 tons, 2 / 5 tons are transported, and () tons are left
1. Fill in "" or "=" in brackets
(11/21*6/7)*42( 1/7
*2. There are 540 boys in Yuhong primary school, 2 / 9 more girls than boys, and 120 more girls than boys
540*2/9=120
*3. From 3 / 4 tons of cement, 2 / 5 tons were transported, and (3 / 10) tons were transported; from 3 / 4 tons, 2 / 5 tons were transported, and (7 / 20) tons were left
3/4*2/5=3/10
3/4-2/5=7/20
Break through in Mathematics (fill in the blanks,
1. The length of the first rope is 3 / 4 of the length of the second one, and the first one is longer than the second one______
Set the second rope to 1.1-3 / 4 = 1 / 4
Mathematical breakthrough (fill in the blanks, write the process)
1. Use 3 meters long iron wire to fold a cube frame. The volume of the cube is______ cubic metre.
2. For a fraction, the number of molecules is four times larger and the number of molecules is three times smaller. After reduction, it is 10. The fraction is_____ .
3. The sum of an integer and its reciprocal is 8.125______ Its reciprocal is______
A = 3 / 12M, v = (3 / 12) ^ 3 = 1 / 64 (cubic meter). 2. A fraction, the molecule expands 4 times, the molecule shrinks 3 times. After simplification, it is 10, and this fraction is 5 / 6. After simplification, it is 10, and before simplification, it is 10 / 1, 20 / 2. This fraction is 5 / 6.3
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