So: 65438+7: 02 =(35).
The reciprocal of 2 and 4 is a quarter, and the reciprocal of 8+0 1 is 1 1.
(Two numbers are multiplied by 1 reciprocal) So a quarter of 0 plus 165438+8 is 43 of 44.
The sum of the reciprocal of 4 and the eleventh of 8 is (43 out of 44).
3.65438+2/03 (13) = 1.5 (2/3) = 15 (15438+0) = 1.
As long as 1.5 is converted into 3/2 of the false score, the key is the final "= 1".
4. Eleven twenty-one times six sevenths) times 42 is less than eleven twenty-one times 42.
(one seventh+one eighth) times 56 is greater than (specific size) one seventh+one eighth times 56.
The first one: 2 1: 1 1 multiplied by 42 is the same as the first two formulas. The first formula is multiplied by 6/7 and then multiplied by a number less than 1, and the product is less than the original number.
The second one: using multiplication and division, rewrite the first formula as one seventh times 56+ one eighth times 56. Compared with the second formula, "one seventh times 56" is greater than "one seventh", so the result of the first formula is greater than that of the second formula.
5. If one fifth times A= five eighths times B= 1, then A+B=(6 3/5).
The same algorithm as the third lane is to multiply two numbers to get 1, which is the reciprocal. Calculate that A gets 5 and B gets 8 out of 5, which adds up to 6 and 3 out of 5. It can also be written as 5 points and 33 points.
6. Two-fifths of the three-quarters tons of cement were transported away, leaving (9/20) tons; Three-quarters of the cement has been removed by two-fifths, leaving (7/20) tons.
The first one: 2/5 is unitless, 2/5 is far, 3/5 is left, and 3/4 is multiplied by 3/5 to get 9/20.
Second: 2/5 tons, using the unit, to subtract 2/5 tons from it. Subtract 2/5 from 3/4 to get 7/20.
7. Judgment: Three eighths of 5M is as long as five eighths of 3M. (Yes) Comparing 5M times three eighths with 3M times five eighths, the result is 15M.
8. Choice: 0.35 and (b) are reciprocal.
A. Seven tenths B. Twenty tenths C.20 D.7
The component number of 0.35 is 35 in 100, and now it is about 7 in 20, so the reciprocal is 20 in 7.
There are many questions in the countdown exam. The next issue of grade five, right?