Subtraction is the inverse of addition, and division is the inverse of multiplication______ ．

Subtraction is the inverse of addition, and division is the inverse of multiplication______ ．

Subtraction is the inverse of addition, and division is the inverse of multiplication

In decimal addition and subtraction, decimal point alignment is digit alignment ()
Don't you need to emphasize the same digits?

As long as the decimal point is aligned, the other same digits are aligned

To calculate the decimal addition and subtraction, the decimal point should be aligned, that is, the last place of each number should be aligned

Wrong

Help percentage score
6.5%、27%、0.7%、4.6%、18.4%、0.07%、18.5%、90%、1.08%、10.5%、4%、3%、25%、20%、10%、50%、75%、12.5%、125%、37.5%、62.5%、87.5%、175%、180%、40%、55%、76%、60%、70%、80%、90%、120%.

6.5%=13/50
27%=27/100
0.7%=7/1000
4.6%=46/100=23/50
18.4%=184/1000=92/500=46/250=23/125
0.07%=7/10000
18.5%=185/1000=37/200
90%=90/100=9/10
1.08%=108/10000=54/5000=27/2500
10.5%=105/1000=21/200
4%=4/100=1/25
3%=3/100
25%=25/100=1/4
20%=20/100=1/4
10%=10/100=1/10
50%=50/100=1/2
75%=75/100=3/4
12.5%=125/1000=1/8
125%=125/100=5/4
37.5%=375/1000=3/8
62.5%=625/1000=5/8
87.5%=875/1000=35/40=7/8
175%=175/100=7/4
180%=180/100=18/10=9/5
40%=40/100=2/5
55%=55/100=11/20
76%=76/100=38/40=19/20
60%=60/100=3/5
70%=70/100=7/10
80%=80/100=4/5
90%=90/100=9/10
120%=120/100=6/5

How to change percentage into fraction and change fraction into percentage
Percentage: 1.23% 2.8% 3.150% 4.7.5% 5.25% 6.28%
The percentage of fraction: 1.8/5 2.4/1 3.25/8 4.5/1 5.10/3 6.7/5

Percentages: 1, 8 / 5 = 160% 2, 4 / 1 = 400% 3, 25 / 8 = 312.5% 4, 5 / 1 = 500% 5

Simplify 2.050 as (), rewrite it as fraction (), and convert it into percentage ()

Simplify 2.050 to (2.05), rewrite it to score (2 and 1 / 20), and change it to percentage (205%)

Scale simplification
1.35:0.9 reduction
2 / 5:4 / 7 simplification

1.35：0.9＝（1.35×100）：（0.9×100）＝135：90＝（135÷45）：（90÷45）＝3：2
2/5：4/7＝（2/5×35）：（4/7×35）＝14：20＝（14÷2）：（20÷2）＝7：10

What is the operation law of a &; B &; C = a + (B + C)

Law of combination of addition

A-b-c = a - (B + C) what's the law

This uses the law of combination of addition

Five laws and literal expression of two properties
Multiplication allocation rate multiplication commutative law multiplication combining law addition commutative law addition combining law subtraction properties division properties

Additive commutative law: a + B = B + A
The law of combination of addition: a + B + C = a + (B + C)
Commutative law of multiplication: a * b = b * a
Multiplicative Association Law: a * b * C = a * (b * c)
Multiplicative distribution law: (a + b) * C = a * C + b * C
The nature of subtraction: a-b-c = a - (B + C)
The nature of division: A / B / C = A / (b * c)