37 x 18 - 9 x 14 + 100

=37*2*9-9*14+100

=74*9-9*14+100

=9*(74-14)+100

=9*60+100

=540+100

=640

15 x 2 + 15 x 3 + 15 x 5

=15*(2+3+5)

=15*10

=150

52 + 37 + 48 + 63

=(52+48)+(37+63)

=100+100

=200

37 x 18 - 9 x 14 + 100 = 37 x 2 x 9 - 9 x 14 + 100

= 74 x 9 - 9 x 14 + 100

= (74 - 14) x 9 +100

= 60 x 9 + 100

= 540 + 100

= 550

15 x 2 + 15 x 3 + 15 x 5 = 15 x ( 2 + 3 +5 )

= 15 x 10

= 150

52 + 37 + 48 + 63 = (52 + 48) + (37 + 63)

= 100 + 100

= 200

Duyệt!!!

37 x 18 - 9 x 14 + 100 = 37 x 2 x 9 - 9 x 14 + 100

= 74 x 9 - 9 x 14 + 100

= (74 - 14) x 9 +100

= 60 x 9 + 100

= 540 + 100

= 550

15 x 2 + 15 x 3 + 15 x 5 = 15 x ( 2 + 3 +5 )

= 15 x 10

= 150

52 + 37 + 48 + 63 = (52 + 48) + (37 + 63)

= 100 + 100

= 200

=(0,2+24)x5

=14

`29 xx 20,22 + 15 xx 20,22 + 20,22 xx 44 + 24 xx 10,11`

`= 20,22 xx (29 + 15 + 44 + 12)`

`= 20,22 xx 100`

`= 2022`

C1 : 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 24 x 10,11

= 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 12 x (2 x 10,11)

= 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 12 x 20,22

= 20,22 x 100

= 2022

C2: 29 x 20,22 + 15 x 20,22 + 20,22 x 44 + 24 x 10,11

= 20,22 x ( 29 + 15 + 44 + 12 )

= 20,22 x 100

= 2022

\(\frac{5x8x24x27}{8x15x9x7}=\frac{5x8x24x9x3}{8x5x3x9x7}=\frac{24}{7}\)

Chúc bạn học tốt.

😁😁😁

Ta tính thuận tiện bằng cách phân tích các thừa số để bỏ thừa số chung:

\(\frac{5\text{x}8\text{x}24\text{x}27}{8\text{x}15\text{x}9\text{x}7}=\frac{5\text{x}8\text{x}3\text{x}8\text{x}3\text{x}3\text{x}3}{8\text{x}3\text{x}5\text{x}3\text{x}3\text{x}7}\)

\(=\frac{8\text{x}3}{7}\)

\(=\frac{24}{7}\)

395 x15 +85 x 395  

=395 x (15+85)

=395 x 100

=3950

289 x 47 - 289 x 17      

=289 x (47-17)

=289 x 30

=8670   

2051 x [ 15 - 9]    

=2051 x 6

=12306

29 x94 - 2912 x 4

đề sai

395x15+85x395

=395x(15+85)

=395x100

=39500

289x47-289x17

=289x(47-17)

=289x30

=8670

2051x(15-9)

=2051x6

=12306

29x94-2912x4

=2726-11648

=-8922

2364 x 37 + 2364 x 63  = 2364 × (37 + 63)

= 2364 × 100

= 236400

= 5 x 24 + 5 x 56 + 5 x 19 + 5 x 1

= 5 x (24 + 56 + 19 + 1)

= 5 x 100

= 500

= 5 x 24 + 5 x 56 + 5 x 19 + 5 x 1

= 5 x (24 + 56 + 19 + 1)

= 5 x 100

= 500

1/125 nha em 

HT  

@@@@@@ 

@@@@@@@@@@@@@@@

1/25 nha

HT

1/125

135 x 37 + 135 +  62 x 135

= 135 x 37 + 135 x 1 +  62 x 135

= 135 x ( 37 + 1 + 62)

 = 135 x 100

= 13500