(158x168-79x58):11:10

=(26 544-4582):11:10

=21 962:11:10

=21 962/11:10

=10981/55

( 158 x 168 - 79 x 58 ) : 11 : 10 = ( 158 x 168 - 79 x 2 x 29) : 11 : 10

= ( 158 x 168 - 158 x 29) : 11 : 10

= 158 x ( 168 - 29 ) : 11 : 10

= 158 x 139 : 11 : 10

= 21962 : 11 : 10

= 10981/55

đáp số = \(\frac{10981}{55}\)

347+78-4+76+58-569+354-68+26

=347 + 74 +134 -569 +312

=555 - 881

=-326

ủng hộ mik lên 0 điểm nha!

347+78-4+76+58-569+354-68+26=325

347+78-4+76+58-569+354-68+26=298

x- 26-78 = 76-58

x-26-78 =18

x-26= 18+78

x-26=96

x= 96+26

x=122

đáp số x=122

cậu làm sai rồi 26 - 37 = 76 - 58

x - 26 - 37 = 18

x - 26 = 18+37

x        = 55 + 26

x        = 81

a) 1,75 : 0,25 + 1,75 : 0,5 + 1,75 : 0,25
= 1, 75 : \(\dfrac{1}{4}\) + 1,75 : \(\dfrac{1}{2}\) + 1,75 : \(\dfrac{1}{4}\)
= 1,75 x 4 + 1,75 x 2 + 1,75 x 4
= 1,75 x (4 + 2 + 4)
= 1,75 x 10
= 17,5

b) 26,3 x 101 - 26 - 0,3
= 26,3 x 101 - (26 + 0,3)
= 26,3 x 101 - 26,3 x 1
= 26,3 x (101 - 1)
= 26,3 x 100
= 2630

c) (200 - 58) x 42 + (100 + 42) x 58
= 142 x 42 + 142 x 58
= 142 x (42 + 58)
= 142 x 100
= 14200

5 8 : 15 8 = 5 8 × 8 15 = 40 120 = 1 3

a) -158 - (532 - 158) + 32
= -158 - 374 + 32
= -532 + 32
=-500

b) (34-419)-(34-76-419)
=- 385 -(-42-419)
=-358-(-461)
=103

a/-158-374+32

=-532+32=-500

 b/-385--461=76