Question

1) Tính

a) 10-(-7)+36-(-106)

b) 129-5.{29-(6-1)^2}

c) 42-(-50) + (-42) - 120

d) 1560:Ơ5.79-(125+5.49)+5.21

Answer 1

1) Tính

a) 10-(-7)+36-(-106)

= 10 + 7 + 36 + 106

= 17 + 36 + 106

= 53 + 106

= 159

b) 129 - 5. {29-(6-1)² }

= 129 - 5. { 29 - 5² }

= 129 - 5. { 29 - 25 } 

= 129 - 5. 4

= 129 - 20

= 109

c)  42-(-50) + (-42) - 120

= 42+ (-42) -  ( 120 - 50 )

= 0 - 70

= - 70

Answer 2

a, 10 -(-7)+36-(-106)=10 +7+36+106=17+142=159

 

Answer 3

b,129-5.(29-(6-1)^2)=129-5.(29-5^2)=129-5.(29-10)=124.19=2356