What is the scale

RELATED INFORMATIONS

• 1. Fill in the same number in the brackets to make the equation hold. 0.3 × () × - () 0.25 = 21.15-7 × () 0.3×( )× － ( )0.25＝21.15－7×( )
• 2. -What numbers should be filled in brackets 1,0,4,22, ()
• 3. Fill in the number according to the rule. 0,8,24,48, (), 120
• 4. (1) Fill in the same number in the following two (), the equation holds. 24 × () - () × 15 = 18
• 5. The following questions add appropriate brackets to make the equation hold: 24 + 12 △ 4-1 × 2 = 18, 24 + 12 △ 4-1 × 2 = 30?
• 6. 2.6.4.12.8.18.16.24 fill in the number in order. How do you fill in the following
• 7. It's said to be a first grade problem Sorry, it's four brackets, that is: fill in the correct number in the brackets, regular: 10,20,11,18,12,16,13,14, () Better have an explanation
• 8. Calculation by simple method: - 3.14 × 35.2 + 6.28 × (- 23.3) - 1.57 × 36.4=______ ．
• 9. 1/1*2*3+1/2*3*4+.+1/20*21*22
• 10. If 0.25 × 4 = 1, then 0.25 and 4 are reciprocal, right or wrong?
• 11. Why is the result equal to 0.80.48
• 12. 4 [2x-8] is equal to 24.4
• 13. If - [+ (- 2x)] = 8, then x is equal to
• 14. When is 780 seconds 7.8 days
• 15. Three fifths of a number is 8.5 more than 40% of the number. Find the number Use the comprehensive formula!
• 16. 2.4 of x equals 0.8:3
• 17. 25 times 8 / 7 times 4 times 0.875 is right
• 18. What is 100 plus 200 divided by 25 times 100
• 19. 3/17+x=15/17,x+7/16=13/18,x-4/39=5/13
• 20. What's 20 out of 30 equal to 21?