How to solve the math problem with simple calculation: 45 times 12 plus 12 times 58 minus 3 times 3 times 4

How to solve the math problem with simple calculation: 45 times 12 plus 12 times 58 minus 3 times 3 times 4

45 times 12 plus 12 times 58 minus 3 times 3 times 4
=45*12+12*58-3*12
=12*（45+58-3）
=12*100
=1200

3.2 - (- 3 / 4) - 5 / 24 + (- 2.1)

3.2-（-3/4）-5/24+（-2.1）
=3.2+3/4-5/24-2.1
=3.2-2.1+3/4-5/24
=1.1+13/24
=11/10+13/24
=197/120

7 * 4 / 3 of 24 + 7 / 4 of 24, 7 * 8 / 8 of 8, 7 * 8 of 36, 7 / 12 of 11 / 33, 5 (7 / 8 of 1-9) * (6 of 1-5)
7 * 4 / 3 of 24 + 7 / 4 of 24, 7 * 8 / 8 of 8, 7 * 8 of 36, 7 / 12 of 11 / 33, 5 (7 / 8 of 1-9) * (6 of 1-5)
These four questions can be simple
The formula should be simple

（7/24）×（3/4）＋（7/24）÷4
＝（7/24）×（3/4）＋（7/24）×（1/4）
＝（7/24）×（3/4＋1/4）
＝（7/24）×1
＝7/24
（7/8）×8÷（7/8）×8
＝（7/8）÷（7/8）×8×8
＝1×8×8
＝64
（7/36）÷（11/12）÷（5/33）
＝（7/36）×（12/11）×（33/5）
＝（7/36）×（12/11×33/5）
＝（7/36）×（36/5）
＝7/5
（1－7/9÷7/8）×（1－5/6）
＝（1－8/9）×（1/6）
＝（1/9）×（1/6）
＝1/54

(96 73 / 72 + 36 25 / 24) / (32 73 / 24 + 12 25 / 8)

(96 73 / 72 + 36 25 / 24) / (32 73 / 24 + 12 25 / 8)
=3 × (24 / 32 / 73 + 8 / 12 / 25) / (24 / 32 / 73 + 8 / 12 / 25)
=3

Put the following scores in the order of 12 / 24, 20 / 25, 16 / 28 and 9 / 21

Little brother, let me explain it
Approximate score: 1 / 2, 4 / 5, 4 / 7, 3 / 7
From small to large: 3 / 7, 1 / 2, 4 / 7, 4 / 5

Divide 24 / 21, 25 / 20, 20 / 16, 21 / 9 and arrange them from small to large

24/21＝8/7
25/20＝5/4
20/16＝5/4
21/9＝7/3
8/7,5/4,7/3

3/7*5/6+3/8+1/12
That's the fraction line

3/7*5/6+3/8+1/12
=5/14+3/8+1/12
=60/168+63/168+14/168
=137/168

(5 / 12 + 1 / 15) * 24 * 25 2001 * 7 + 5 / 8 + 1.375 * 2001 + 667 divided by 1 / 3 [2 - (1 / 4 * 5 / 7 + 1.25 * 2 / 7)] / 0.375
(5 / 12 + 1 / 15) * 24 * 25 2001 * 7 + 5 / 8 + 1.375 * 2001 + 667 divided by 1 / 3 [2 - (1 / 4 * 5 / 7 + 1.25 * 2 / 7)] / 0.375

290 20010 2

【-1/2+1/6-3/8+5/12】*【-24】
Just count

Solution: the original formula = (- 1 / 2) * (- 24) + 1 / 6 * (- 24) - 3 / 8 * (- 24) + 5 / 12 * (- 24)
=12-4+9-10
=7

1 and 7 / 4-2 and 2 / 1 + 1 and 7 / 3 (8 / 5-0.375 + 12 / 7) × 24-12 ^ (3 / 5 / 2 + 0.6)

The first question is converted into a fraction with 14 as the denominator
22/14-35/14+20/14=7/14=1/2
Question 2 (5 / 8-3 / 8 + 7 / 12) × 24-12 △ (17 / 5 + 3 / 5)
= 20/24×24-12÷4
= 20-3
= 17
Hope it works for you
I wish you progress in your study_ ∩)O~