3 of 7 parts plus 3.6 minus 1 of 7 parts plus 6.4 (simple calculation)

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• 1. One in three, one in two minus one in two, one in four equals zero with brackets
• 2. 3.14 times 1 and 3 / 8 plus 0.314 times 25 / 4 minus 31.4 times 0.2
• 3. 11 out of 8 minus 11 out of 15
• 4. 2. 13 and 21 / 13 times 7, please calculate
• 5. (21:22:11 on the 22nd) Ship a flows downstream from wharf a, and ship B flows upstream from wharf B. the two ships are traveling at the same time and meet at the midpoint. The speed of ship B downstream is twice that of ship a upstream. The known water speed is 4km / h. how to calculate the speed of the two ships in still water?
• 6. How much is 36 × 1 / 3 minus 1 / 4
• 7. How much is 3 minus 5?
• 8. What's 5 and 2 / 5 minus 8
• 9. How much is one minus four?
• 10. What's the difference between two thirds of nine and two thirds of nine
• 11. Write the simple calculation process (1) 1 and 7 / 3 * 5 / 2 + 2 and 7 / 4 * 5 / 2 + 2 / 5 (2) 2.5 * 12.5 * 3.2 (3) (8 / 2) (3) (7 / 8-7 / 12) * 2.4/1 / 7 (4) 805 * 101-805
• 12. 21:56 = 3 / 8 = 12 △ () = ()
• 13. A resistor is connected in series with a 3-ohm resistor and then connected in the original circuit. If the current passing through becomes 4 / 5 of the original current, what is the resistance value of this resistor?
• 14. 100 points
• 15. A fraction, the numerator plus 1, is 3 / 5, and the denominator minus 1, is 4 / 7 You can't use equations to list the formulas. It's a problem for primary school students
• 16. 5 / 12, 5 / 8, 2 / 5, 1 / 15, 11 / 40, 7 / 24 divide these six numbers into three groups, so that the sum of two fractions in each group is equal
• 17. 3 / 7 of a number is 21. What is 1 / 7 of this number?
• 18. 6 out of 7 plus 2 out of 9 minus 1 out of 21
• 19. 9 x (x is an integer), when x equals () the number equals 0
• 20. How to solve that 2x + 30x equals 13.8