What is the simple operation of 7 / 8 * 12 / 13 + 7 / 8 △ 13?

What is the simple operation of 7 / 8 * 12 / 13 + 7 / 8 △ 13?

=7/8*12/13+7/8*1/13=7/8*(12/13+1/13)=7/8*1=7/8
Math problem 24 can be negative or positive
From a deck of playing cards (remove the king of big and small), choose four cards at random, and carry out mixed operation according to the numbers on the card surface (each card can only be drawn once), so that the operation result is 24 or - 24, in which red playing card represents negative number, black playing card represents positive number, J, Q and K represent 11, 12 and 13 respectively, For example: 1, 2, 3, 4, there are (1 + 2 + 3) * 24
Now we have 3-4, 6-13. Please write two formulas. Thank you
[(-13)-3]÷(-4)×6=24
[(-13)-3]×[6÷(-4)]=24
The bus starts from place a, and the truck starts from place B, and runs in opposite directions. One hour later, the bus meets 10 kilometers away from the midpoint. After meeting, the bus continues to drive for 23 hours, and the truck still has 13 kilometers to go. How many kilometers are there between a and B?
A: the distance between a and B is 100 km
Simple operation of 7 / 12 × 13 / 14 + 7 / 12 △ 14
7 / 12 × 13 / 14 + 7 / 12 △ 14
=7 / 12 × 13 / 14 + 7 / 12 × 1 / 14
=7 / 12 × (13 / 14 + 1 / 14)
=7 / 12 × 1
=7 out of 12
Math problems at 24 o'clock
Use 8.6.9.3 to add, subtract, multiply and divide to get 24
(9-8+3)*6=24
8*(6-9/3)=24
6-3=3
3 = 3 divided by 9
3*8=24
A truck runs 48 kilometers in three fourths of an hour, and a bus runs 40 kilometers in half an hour. Which car is faster?
48 △ 3 / 4 = 64 km / h
40 △ 1 / 2 = 80 km / h
64 km / h ＜ 80 km / h
A: the bus is fast
Truck speed: 48 / (3 / 4) = 48 * 4 / 3 = 64
Bus speed: 40 / (1 / 2) = 80
So the bus is fast
How can 13 / 26 × 7 / 12 + 5 / 26 × 13 / 12 be operated easily?
13/26×7/12+5/26×13/12
=13/26×7/12+13/26×5/12
=13/26×（7/12+5/12）
=13/26x1
=13/26
Take any 4 natural numbers from 1 to 13, and add, subtract, multiply and divide the 4 numbers. The result is 24
10-(3*-6+4)=24
10-(3*-6)-4=24
4-10/(3/-6)=24
4-(-6)/3*10=24
4-(-6)/(3/10)=24
4-(10/3*-6)=24
(4+(-6))+10*3=24
(10-4)*3-(-6)=24
(4+10+(-6))*3=24
4-(-6)*10/3=24
(-6+10+4)*3=24
10-4-(3*(-6))=24
Basically, we need to find 4 * 6 or 3 * 8
(10*10-4)/4=24
A freight car and a passenger car leave from a and B at the same time, and they meet four hours later. The passenger car runs more than half of the whole journey of 40 kilometers, and the freight car runs 3 / 8 of the whole journey. How many meters are there between a and B
The truck made three eighths of the journey
The bus made 5 / 8 of the journey
Distance between a and B: 40 ÷ (5 / 8-1 / 2) = 320 (m)
Simple calculation of 12 out of 13 divided by 8 out of 7 plus 7 out of 8 divided by 13
12/13X7/8+7/8X1/13=(12/13+1/13)X7/8=7/8
2/5 x 7/13 + 2/5 x 6/13 +6/10= 2/5 x( 7/13 + 6/13)+6/10=1
I hope the understanding is very simple
12 out of 13 divided by 8 out of 7 plus 7 out of 8 divided by 13
= 12/13 / 7/8 + 7/(8 x 13)
= (12 +1) x 7 / (8x13)
= (13 x 7)/ (8x13)
= 7 / 8
How about 7 / 8 0.4 times 7 / 13 plus 2 / 5 divided by 13 / 6 plus 60%? I'll add 0.4 times 7 of 13 plus 2 of 5 divided by 13 of 6 plus 60%
2 /... Unfold
12 out of 13 divided by 8 out of 7 plus 7 out of 8 divided by 13
= 12/13 / 7/8 + 7/(8 x 13)
= (12 +1) x 7 / (8x13)
= (13 x 7)/ (8x13)
= 7 / 8
7 / 8 question: 0.4 times 7 / 13 plus 2 / 5 divided by 13 / 6 plus 60%? I'll get extra points