Simple calculation: ① 9 / 10 + (2 / 7 + 1 / 10) ② 5 / 3 - (5 / 13 + 2 / 3) ③ 3 / 4-7 / 15-8 / 15 + 1 / 4 emergency Teachers, come on! (kneeling) As long as there is a responder, give you 5 points of experience immediately!

RELATED INFORMATIONS

• 1. How to calculate 10 / 9 / (18 * 15 / 4-5 / 4)
• 2. How to calculate (20-0.8 × 9) × 5.7?
• 3. (20 + 1 / 9) (19 + 8 / 9)? I don't quite understand
• 4. There are 540 sixth grade students in the experimental primary school, and the number of sixth grade students is one fourth of the whole school, How many students are there in the experimental primary school
• 5. There are 1000 students in the experimental primary school, 200 in the sixth grade, of whom 98 are girls. What percentage of the students in the sixth grade are girls What percentage of the students in the whole grade
• 6. There are 1080 students in the art class in the experimental primary school, accounting for 25% of the total number of students in the school. How many students are there in the school?
• 7. There are 120 students in the sixth grade of the experimental primary school, which is equivalent to 5 / 6 of the number of students in the fifth grade. The number of students in the two grades accounts for 2 / 5 of the total number of students in the school How many students are there in the school= Any formula or equation is OK,
• 8. There are 540 sixth grade students in the experimental primary school. The number of sixth grade students is one fourth of the total number of students in the school. How many students are there in the experimental primary school
• 9. There are 1000 students in the experimental primary school. What percentage of the students in Grade 6? What percentage of the students in Grade 6 are female students? This is the answer to the two questions. I want to make it clear. This is the percentage of the first semester of grade six There are 200 students in grade six, 98 of whom are girls
• 10. There are 360 students in the sixth grade of experimental primary school, including 240 boys. What is the proportion of boys in the whole grade? How to express it in percentage?
• 11. (simple calculation) (7 / 15-1 / 3) / / 1 / 3 + 1 / 5 (3 / 4 + 1 / 2) / / 5 / 8 2 / 13 + 3 / 4 △ 9 / 10 + 1 / 6 [3 / 4 - (5 / 8-1 / 4)] / / 3 / 8
• 12. How to calculate 10.55 + 0.6-9.87
• 13. How to calculate (10-7 / 55 × 1) + (9-7 / 55 × 1) + (8-7 / 55 × 1) +. + (1-7 / 55 × 1)?
• 14. (7 / 8 + 13 / 6) / 13 / 16 simple calculation method
• 15. Can 2 out of 13 * 5 out of 11 + 5 out of 13 * 9 out of 11 be simplified?
• 16. How to do 75 times 7 / 74?
• 17. Simple operation; 16 △ 4 / 5 × 7 / 20
• 18. Simplify the ratio of 7 / 20 to 5 / 7
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