How much is 1.2 times 7.5 minus 7.5 times 2.2 plus minus 2.1 divided by 1.5?

How much is 1.2 times 7.5 minus 7.5 times 2.2 plus minus 2.1 divided by 1.5?

1:1 by 7:5 minus 7:5 by 2:1 plus 1:2 divided by 1:5
=3 / 2 × 5 / 7 + 5 / 7 × 5 / 2 - 1 / 2 × 5 / 7
=(3 / 2 + 5 / 2 - 1 / 2) × 5 / 7
=7 / 2 × 5 / 7
=5 / 2

How much is minus 36 / 5 minus 1.5
I forgot it!

Divide 36 by 5 to get 7.2 - 7.2 - (- 1.5) = - 7.2 + 1.5 = - 5.7

Simple operation. 19 × 9 / 4

=（20—1）9/4=20*9/4—9/4

How to calculate 19 out of 20 - (1 out of 4 + 2 out of 5)

19/20-(1/4+2/5)
=19/20-(5/20+8/20)
=19/20-13/20
=6/20
=3/10

(minus one third + one sixth minus one eighth plus one twelfth) × (minus 24)

=Minus one third × (minus 24) + one sixth × (minus 24) - one eighth × (minus 24) + one twelfth × (minus 24)
=8-4+3-2
=5

The sum of one eighteenth divided by one third and one eighth

(1/3)/(1/18)+1/8
=6 and 1 / 8

(one tenth - 1) × (one ninth - 1) × (one eighth - 1) × × (quarter-1) × (third-1)
(one tenth - 1) × (one ninth - 1) × (one eighth - 1) × × (quarter-1) × (third-1) × (half-1)

The result is minus one tenth. In parentheses, you can get minus nine tenths, minus eight ninths, minus seven eighths to minus one half. There are nine minus signs in total. The result is negative. The numerator denominator is approximately divided. The numerator is 9 times 8 times 7 times If you multiply by 1, the denominator is 10 times 9 times 8 times 2, until you multiply by 2, the numerator is left with 1 and the denominator is left with 10

5 × 0.375 + 3 / 8 × 5.4-37.5% × 0.9

5 × 0.375 + 3 / 8 × 5.4-37.5% × 0.9
=3/8×（5.5+5.4-0.9）
=3/8×10
=3.75

The difference between 8 times of X and 5.4 is exactly 5 times of X

8x-5.4=5x
8x-5x=5.4
3x=5.4
x=1.8

7.2 minus 8 times the difference of X, which is exactly 4 times of X, find X

8×（7.2-X）＝4X
8×7.2＝4X+8X
12X=8*7.2
X=8*7.2/12
=0.8