49 x 365 - 39 x 365

= (49-39) x 365

= 10 x 365 = 3650

a) 142 x 12 + 42 x 18

= 142 x (12 +18)

= 142 x 30 = 4260

b) 49 x 365 - 39 x 365

= (49-39) x 365

= 10 x 365 = 3650

c) 4 x 18 x 25

= 18 x (4 x 25)

= 10 x 100 = 1800

Cái gì khó có gg ok

a)   175× 582-25 ×582

= ( 175 - 25 ) x 582

= 150 x 582

= 87300

b)   81 × 365 + 18 ×365 +365

=  81 × 365 + 18 × 365 + 365 x 1

= ( 81 + 18 + 1 ) x 365

= 100 x 365

= 36500

a) \(175\times582-25\times582\)

\(=582\times\left(175-25\right)\)

\(=582\times150\)

\(=87300\)

b) \(81\times365+18\times365+365\)

\(=81\times365+18\times365+365\times1\)

\(=365\times\left(81+19+1\right)\)

\(=365\times100=36500\)

214x{23-12}=214x11=2354

365x{49-39}=365x10=3650

a) 214 x 23 - 214 x 12 = 214 x (23-12) = 214 x 11 = 214 x 10 + 214 = 2140 +214 = 2354

b) 49 x 365 - 39 x 365 = 365 x (49-39) = 365 x 10 = 3650

mình trả lời trước nha

490 × 365 - 390 × 365  =  365 × (490 – 390)

                                          =     365 × 100

                                          =     36500

490 × 365 - 390 × 365  =  365 × (490 – 390)

                                          =     365 × 100 

                                          =     36500

490 × 365 - 390 × 365  =  365 × (490 – 390)

                                          =     365 × 100 

                                          =     36500

a) 142 x 12 + 142 x 18

= 142 x ( 18 + 12 )

= 142 x 30

= 4260

b) 49 . 365 - 39 . 365

= 365 . ( 49 - 39)

= 365 . 10

= 3650

c) 4 . 18 . 25

= 18 . 4 . 25

= 18 . 100

= 1800

a, 142 x 12 + 142 x18=142 x (12+18)= 4260

b, 49 x 365 - 39 x356 = 356 x (49-39)= 3560

c,4 x 18 x 25 = (25 x 4) x 18=1800

a,142 x 12 + 142 x 18 

=142 x (12+18)

=4260

b,49 x 365 - 39 x 365

= 365 x ( 49 -39 )

=365 x 10

=3650

c,4 x 18 x 25

=(4 x 25 ) x 18

= 100 x 18

= 1800