34 and 17 / 23 * 5 / 17. Simple calculation Ten minutes!

34 and 17 / 23 * 5 / 17. Simple calculation Ten minutes!

34 and 17 / 23 * 5 / 17
=（34+17/23）x5/17
=34x5/17+17/23x5/17
=10+5/23
=10 and 5 / 23

Can 5 out of 17 + 5 out of 17 times 3 be easily calculated

5 out of 17 + 5 out of 17 times 3
=5/17x(1+3)
=5/17x4
=20/17

Given 2 ^ a = 3,2 ^ B = 6,2 ^ C = 12, use an equation to express the relationship between a, B, C

3*12=6*6
SO 2 ^ A * 2 ^ C = 2 ^ b * 2 ^ B
2^(a+c)=2^(b+b)
So a + C = 2B

A. B. C is three integers, known as: a △ B △ C = 5, a △ B-C = 12, A-B = 84, a × B × C =?
A. B. C is three integers, known as: a △ B △ C = 5, a △ B-C = 12, A-B = 84, a × B × C =?

A÷B÷C=5
A÷B=5C
A÷B-C=12
5C-C=12
C=3
A÷B=15
A=15B
A-B=15B-B=84
B=6
A=90
A×B×C=1620

A. B and C represent three integers respectively. It is known that a △ B △ C = 5, a △ B-C = 12, and A-B = 84. What is the result of a × B × C?

A △ B = 5C, a △ B = 12 + C, 5C = 12 + C, 4C = 12, C = 3, a △ B = 15, a = 15b, A-B = 84, 15b-b = 84, 14b = 6, a = 15 × 6 = 90, a × B × C = 90 × 6 × 3 = 1620. A: the result of a × B × C is 1620

How much is 19 out of 21 minus 6 out of 7

One twentieth

3.2 times 0.5 equals

1.6

5/7*796/17+11/9*5/17+50*1/9

42155/1071

1.2.3.5.5.8.7.11.（）（）11.

9,14

345, - 17.6, 1 / 48 to 0.1

3.0
zero point seven
-2.6
zero point three