. urgent (need process) Simple calculation 999 △ 9999 and 999 / 1000

. urgent (need process) Simple calculation 999 △ 9999 and 999 / 1000

=1 △ 9999 and 999 / 1000 △ 999) = 1 △ 999 + 999 / 1000 △ 999) = 1 △ 1001 / 1000 = 1 * 1000 / 1001 = 1000 / 1001 or: = (999 × 1 / 999): [(999 + 999 / 1000) × 1 / 999] = 1: [999 × 1 / 999 + 999 / 1000 × 1 / 999] = 1: [999 × 1 / 999] = 1: [1 + 1 / 999]

2840÷24

=2840÷(4+20） =2840×1/4+2840×1/20 =710+142 =852

Calculation: 36 × 1.09 + 1.2 × 67.3=______ ．

36 × 1.09 + 1.2 × 67.3, = 1.2 × 30 × 1.09 + 1.2 × 67.3, = 1.2 × (30 × 1.09) + 1.2 × 67.3, = 1.2 × 33.7 + 1.2 × 67.3, = 1.2 × (33.7 + 67.3), = 1.2 × 100, = 120

A math problem for grade six
One barrel of oil is used up in three days. The weight of the barrel and oil is 58 kg. One third of the oil is used in the first day, and the remaining two thirds are used in the second day. The oil used in the third day is 6 kg less than three seventh of the total oil used in the previous two days. How many kg is the weight of the barrel?

One third of the total was spent on the first day, the remaining two-thirds on the second day, and (1-1 / 3) * 2 / 3 = 4 / 9 on the second day
Three seventh of the total of the previous two days accounted for (1 / 3 + 4 / 9) * 3 / 7 = 1 / 3
On the third day, 6 kg was less than 3 / 7 of the total of the previous two days. 6 kg accounted for 1 / 3 + 4 / 9 + 1 / 3-1 = 1 / 9 of the total
So the total amount of oil is 6 / (1 / 9) = 54 kg
Barrel weight 58-54 = 4kg

Now I don't have any points. I'll make up for them when I adopt them
1. Fill in the operation symbol in () and the number in to make the formula simple
3 7
— ×99+ — =（《 》（ ） 《 》）×《 》
10 10
2. Simple calculation
23 16 16 1
— × — + — × —
25 17 25 17
The first question is 99

3/10×99＋7/10=3/10×（100-1）+7/10=3/10×100-3/10+7/10=29
23/25×16/17+16/25×1/17=16/25×23/17+16/25×1/17=（23/17+1/17）×16/25=24/17×16/25=384/425

1. [5 / 12 - (1 / 3-1 / 7)] 19 / 21
2. 4 / 7-20 × 5%
3. 1 - (1 / 15 + 1 / 21) × 105
4、（870+870+87）÷87

1、
[5/12 - (1/3 - 1/7)] ÷ (19/21)
= (5/12 - 4/21) × 21/19
= 105/228 - 4/19
= 105/228 - 48/228
= 57/228
= 1/4
2、
12 ÷ (4/7) - 20×5％
= 21 - 1
= 20
3、
12.1 - (1/15 + 1/21) × 105
= 12.1 - (7/105 + 5/105) × 105
= 12.1 - 12/105 × 105
= 12.1 - 12
= 0.1
4、
(870 + 870 + 87) ÷ 87
= 10 + 10 + 1
= 21

1=5,2=25,3=125,4=1245,5=?

1

If 1 = 5 2 = 15 3 = 125 4 = 1245 5 =?

5=1

1 = 5, 2 = 15, 3 = 125, 4 = 1245, then 5 =

5=1
Don't be confused by the results

1 = 5, 2 = 15, 3 = 125, 4 = 1245, 5 =? The skull is bigger
thank you!

5=1
Because the title has said 1 = 5, so 5 = 1