() multiplied by 0.3 equals 1

() multiplied by 0.3 equals 1

（）×0.3=1
（）=1÷0.3
() = 10 / 3

5,7,4,9,25 what's the next number? 3Q

(5-7)^2=4 (7-4)^2=9 (4-9)^2=25 (9-25)^2=196

How many%? 3Q is 0.4 out of 100

0.4%

Fill in the middle of the numbers 1 2 3 4 5 6 7 8 9 to add or subtract 99

1、1-2+3+4+5+6-7+89
2、1+2-3+4+5-6+7+89
3、1+2+3-4-5+6+7+89
4、1-2-3-4+5+6+7+89
5、1-2+34+56-7+8+9
6、12+3-4-5+6+78+9
7、12-3+4+5-6+78+9

For example, how many sets of 3q are needed to take 7 from 1-45 to be equal to 85

There is no fixed formula. Computer programming can solve this problem

If we know that one part of M + one part of n = one part of M + one part of N, then n part of M + n part of M is equal to?

1/m+1/n=1/(m+n)
General division
(m+n)/mn=1/(m+n)
(m+n)²=mn
m²+2mn+n²=mn
m²+n²=-mn
n/m+m/n
=(m²+n²)/mn
=-mn/mn
=-1

What's 30 plus 30?

My

How many tons is 3 tons 57 kg?

Equal to 3.057 tons 1 ton = 1000 kg

36 min 30 s=（ ）s=（ ）h 2.4 h=（ ）h=（ ）min

36 min 30 s=（2190 ）s=（0.61 ）h
4 h = (2 and 1 / 15) H = (144) min

25m / S = km / h 108km / h equals M / s 4dm / min equals M / S

1km/h=1m/3.6h
25m/s=25*3.6=90km/h
What m / S is 108km / h equal to
=108/3.6=30m/s
What m / S is 4dm / min
4*10/60=2/3m/s