What can be calculated simply: 1, 125 and 3 / 8x (9 and 2 / 4-3.72 + 3.25-1 and 7 / 25) 2. (8 5 / 7-1.625-3 3 / 8) △ 1 6 / 7

What can be calculated simply: 1, 125 and 3 / 8x (9 and 2 / 4-3.72 + 3.25-1 and 7 / 25) 2. (8 5 / 7-1.625-3 3 / 8) △ 1 6 / 7

1. 125 + 3 / 8x (9 + 2 / 4-3.72 + 3.25-1 + 7 / 25)
=1003/8×(12+3/4-5)
=1003/8×31/4
=31093/32
Is there a wrong number in question 1?
1. 125 and 3 / 8x (9 and 3 / 4-3.72 + 3.25-1 and 7 / 25) here is 3 / 4
=1003/8×(13-5)
=1003/8×8
=1003
2. (8 5 / 7-1.625-3 3 / 8) △ 1 6 / 7
=(8+5/7-5)×7/13
=26/7×7/13
=2

Simple calculation of 9.4 × 1 / 4 + 0.25 × 3 / 5

9.4×1/4+0.25×3/5=9.4×0.25+0.25×0.6=0.25×(9.4+0.6)=0.25×10=2.5

How to calculate 0.8 * 3.9 * 1.25

0.8*3.9*1.25
=(0.8*1.25)*3.9
=1*3.9
=3.9

6.3 * 9.9 simple calculation 7.34 * 6.4-6.4 * 3.25 * 0.72 simple calculation

6.3*9.9
=6.3x(10-0.1)
=6.3x10-6.3x0.1
=63-0.63
=62.37
7.34*6.4-6.4*3.25*0.72
= 7.34*6.4-6.4*2.34
=6.4x(7.34-2.34)
=6.4x5
=32

Simple calculation of {3 / 4 - (7 / 16-0.25)} * 16 / 9

{3/4-(7/16-0.25)}*16/9
=(3/4+1/4-7/16)*16/9
=9/16*16/9
=1

Use the recursive equation to calculate (if it can be simplified, it should be simplified)
Use the recursive equation to calculate (if it can be simplified, it should be simplified). 1.25 △ 5 + 0.25x20

1.25÷5+0.25x20
=0.25+5
=5.25

1.6 × 1.25 × 0.5, recursive equation

(22.4-12.8)/0.64/0.

=9.6÷（0.64×0.5）
=9.6÷0.32
=30

Simple calculation of (5 / 12) / (2 / 3) - 3 / 8 * 4 / 9
(8 / 15 + * 2 / 3) / 1 / 12
It's urgent to simplify the calculation of those that can

(5/12)/(2/3)-3/8*4/9
=5/12×3/2-1/6
=5/4×1/2-1/6
=5/8-1/6
=15/24-4/24
=11/24
(8 / 15 + 9 / 20 * 2 / 3) / 1 / 12
=(8 / 15 + 9 / 20 * 2 / 3) × 12
=8 × 12 out of 15 + 3 × 12 out of 10
=32 out of 5 + 18 out of 5
=50 out of 5
=10

Can 12.8 + 2.04 × 9.5 be simply calculated

If we need to simplify the calculation, we can:
12.8+2.04×9.5
=12.8+(2+0.04)×(10-0.5)
=12.8+2×10-2×0.5+0.04×10-0.04×0.5
=12.8+20-1+0.4-0.02
=32.18