Simple calculation method 2.5×0.7²-2.5×0.3²

=2.5×（0.7²-0.3²）
=2.5×（0.7-0.3）×（0.7+0.3）
=2.5×0.4×1
=1×1
=1

RELATED INFORMATIONS

1. It is calculated by a simple method 1.6.27×3.6+37.8×0.36 2.369×0.99+3.69 3.（0.64+0.32）÷0.64 4.13.5×2.5-0.35×25 5.0.76÷0.4-0.38 6.12.8+0.792÷0.9
2. 137 times 1 / 136 is equal to
3. How to calculate 672-36 + 64 with a simple algorithm?
4. A simple algorithm of 36 × 64 + 64 × 64 =
5. 25 + 25 + 36 + 64 = simple algorithm
6. Simple calculation of 99 × 38 + 38
7. Simple calculation of 200.8 * 99 + 20.08 * 10
8. Fill in the blanks on page 99 of the sixth grade mathematics textbook Who knows? Thank you······· 1. Four kinds of fruits are transported from the fruit shop. Apples and bananas account for half of the total. Apples and watermelons account for two fifths of the total. Apples and watermelons account for 25% of the total. How many% of the total are apples 2. A circle is divided into several small sectors to form an approximate rectangle. If the length of the rectangle is 6.42 cm more than the width, what is the area of the circle 3. Draw the largest semicircle in the isosceles right triangle, the shadow area is 0.43 square centimeter, how many square centimeter is the area of isosceles right triangle, the shadow is above the largest circle 4. There are 40 tricycles and cars in the parking lot. The total number of wheels of tricycles is one more than that of cars. How many cars are there in the parking lot
9. 1.8 of 3 = 32 of () = () of () 2.16 divided by 13 = () of () = () () of ()
10. Point a (3,2) is a fixed point, point F is the focus of the parabola y2 = 4x, and point P moves on the parabola y2 = 4x. If | PA | + | PF | gets the minimum value, then the coordinate of point P is______ ．
11. How to get 3000 by simple method?
12. Ten out of fifteen is one third of 16 / 24 = () 8 = () 8 / 8 = 48 △ () = () / ()
13. 9.999+9.99+9.9+0.1=?
14. Simple calculation of (12 + 1 / 4) △ 25
15. How to write in English
16. What is 30 divided by 15 out of 28?
17. 2.9 + 0.46 + 7.1 + 0.54 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 30 △ 2.5 + 1.6 × 2.50.4 × (25 + 2.5) 4.97 × [2.46 ÷ (5.58-5.28)]
18. 25 times 3.2 times 0.25, 90 times (72 minus 14.4) and 3.69 times 77 minus 8 times 21 minus 1.375
19. Number reasoning 123 129 141 147?
20. Number reasoning: 1 3 11 123 () A. 15131 b.146 c.16768 d.96543 please choose the right answer according to the law of numbers and explain the order of it