(3.8-1.8 △ 2) × 0.5 1 / 4 × 4 △ 1 / 4 × 4 8 / 13 △ 7 + 1 / 7 × 5 / 13 （3.8-1.8÷2）×0.5 1/4×4÷1/4×4 8/13÷7+1/7×5/13

(3.8-1.8 △ 2) × 0.5 1 / 4 × 4 △ 1 / 4 × 4 8 / 13 △ 7 + 1 / 7 × 5 / 13 （3.8-1.8÷2）×0.5 1/4×4÷1/4×4 8/13÷7+1/7×5/13

"Crystal" Hello, I'm glad to answer for you!
Simple algorithm:
（3.8-1.8÷2）×0.5
=(3.8-0.9)×0.5
=3.8×0.5-0.9×0.5
=1.45
1/4×4÷1/4×4
=(1/4÷1/4)×4×4
=4×4
=16
8/13÷7+1/7×5/13
=8/13×1/7+1/7×5/13
=1/7×(8/13+5/13)
=1/7
Common algorithm:
（3.8-1.8÷2）×0.5
=(3.8-0.9)×0.5
=2.9×0.5
=1.45
1/4×4÷1/4×4
=1÷1/4×4
=4×4
=16
8/13÷7+1/7×5/13
=8/91+5/91
=13/91
=1/7

Is there a simple algorithm for 1200 times 12 / 13?
What's the answer

1200 * (1-1 / 13)
=1200-1200/13=1107.69

-Simple algorithm of 13 × 2 / 3-0.34 × 2 / 7 = 1 / 3 × (- 13) - 5 / 7 × 0.34

-13*2/3-0.34*2/7+1/3 *(-13)-5/7 *0.34
=-13*(2/3+1/3)-0.34*(2/7+5/7)
=-13-0.34
=-13.34
There's a little mistake in the upstairs. This is right. Use multiplication to solve it. Sweat. Almost hit the recipe

How to calculate 12 / 7 * 13 with a simple algorithm?

12 / 7 * 14-12 / 7 = 24-12 / 7 = 22 + 14 / 7-12 / 7 = 22 + 2 / 7 = 22 and 2 / 7

Clever calculation: 8 + 9 + 10. + 199 + 200

8+9+10.+199+200
=1+2+3+…… +199+200-1-2-3-4-5-6-7
=（1+200）*200/2-1-2-3-4-5-6-7
=20100-1-2-3-4-5-6-7
=20 072

199.9*19.98-199.8*19.97

=19.99*199.8-199.8*19.97
=199.8*（19.99-19.97）
=（200-0.2）*0.02
=4-0.004
=3.996

0.2008+2.008+20.08+200.8+2008=?
I want the solution

=2008×（0.0001+0.001+0.01+0.1+1）=2008×1.1111=2231.0888

Simple calculation: 41.2 × 8.1 + 5.37 × 19 + 1.1 × 92.5

=40*8+40*0.1+1.2*8+1.2*0.1+5.37*20-5.37+1*92.5+0.1*92.5
=320+4+9.6+0.12+107.4-5.37+92.5+9.25
=537.5

41:5 1 * 8.1 + 5.37 * 19 + 1.1 * 92:1

333.72+102.03+101.75=537.5

(41 1/5)*1/5*8.1 5.37*19 1.1*(92 1/2)=?
41 1/5)*1/5*8.1 5.37*19+ 1.1*(92 1/2)=?

what is it?
It's like the book of heaven