\(=46\left(17+38+1+44\right)\)

\(=4600\)

ủa a chỗ kia là 26 x 44 mà có phải 46 đou

a, 49 x 385 - 39 x 385

= 385 x ( 49 - 39)

= 385 x 10

= 3850

b, 46 x 17 + 38 x 46 + 46 x 44 + 46

= 46 x 17 + 38 x 46 + 46 x 44 + 46 x 1

= 46 x (17 + 38 + 44 + 1)

= 46 x 100

= 4600 

    57 \(\times\) 46 + 57 \(\times\) 54

= 57    \(\times\) ( 46 + 54)

= 57 \(\times\) 100

= 5700

137 + 355 + 63 + 45

= ( 137 + 63) + ( 355 + 45)

= 200 + 400

= 600

215 \(\times\) 48 - 215 \(\times\) 38

= 215 \(\times\) ( 48 - 38)

= 215 \(\times\) 10

= 2150 

4 \(\times\) 50 \(\times\) 25 

= ( 4 \(\times\) 25) \(\times\) 50

= 100 \(\times\) 50

= 5 000

57×(46+54) =57×100=5700

137+355+63+45=(137+63) +(355+45) =200+400=600

215×48-215×38=215×(48-38) =215×10=2150

4×50×25=(4×25) ×50=100×50=5000

29,079 x 45 + 29,079 - 46 x 29,079

= 29,079 x (45 + 1 - 46)

= 29,079 x 0 = 0

29.079 x 45 + 29.079 - 46 x 29.079

= 29.079 x 45 + 29.079 x 1 - 46 x 29.079

= 29.079 x (45 + 1 - 46)

= 29 079 x 0

= 0

Sửa đề: \(\left(46\times369+46\right)-\left(268\times45+268\right)\)

\(=46\times\left(369+1\right)-268\times\left(45+1\right)\)

\(=46\times\left(370-268\right)\)

\(=46\times102\)

\(=4692\)

\(=246\times\left(145+1-46\right)=246\times100=2460\)

cảm ơn bạn

a﴿ ﴾46+2﴿x12:2 = 288

b﴿3,24x1,7+1,7x4,65‐13,78x0,85

= 1,7 x ﴾3,24+4,65﴿ ‐ 13,78x0,85

= 1,7 x 7,89 ‐ 11,713

= 13,413 ‐ 11,713

= 1,7 

a) (46+2)x12:2 = 288

b)3,24x1,7+1,7x4,65-13,78x0,85

= 1,7 x (3,24+4,65) - 13,78x0,85

= 1,7 x 7,89 - 11,713

= 13,413 - 11,713

= 1,7

123 x 54 + 123 x 46

= 123 x (54 +46) = 123 x 100

= 12300