Toán Lớp 6: Bài 1 a.(-35)+23-(-35)-47+(-115) c.37-(-43)+(-85)-(-30)+15 b.24-(-136)-(-79)+15

Question

Toán Lớp 6:  Bài 1 a.(-35)+23-(-35)-47+(-115)              c.37-(-43)+(-85)-(-30)+15 b.24-(-136)-(-79)+15

buithaianh98 · Answer

a)(&minus;35)+23&minus;(&minus;35)&minus;47+(&minus;115)   =(-35)+23+35-47+(-115)   =(35-35)-(47-23)+(-115)   =0&minus;24+(&minus;115)   =&minus;24+(&minus;115)   =&minus;139   b)24&minus;(&minus;136)&minus;(&minus;79)+15   =24+136+79+15   =(24+136)+(79+15)   =160+94   =254   c)37&minus;(&minus;43)+(&minus;85)&minus;(&minus;30)+15   =37+43+(-85)+30+15   =(37+43)+(15-85)+30   =80+(-70)+30   =10+30   =40

chauhoangmy98 · Answer

B&agrave;i 1:   a. $(-35)+23-(-35)-47+(-115)$ $=[(-35)-(-35)]-47+23+(-115)$ $=0-70+(-115)$=$-70+(-115)$$=-185$ b. $24-(-136)-(-79)+15$ $=[24-(-136)]-(-79)+15$ $=160-(-64)$$=224$ c. $37-(-43)+(-85)-(-30)+15$ $=[37-(-43)]+[(-85)+15]-(-30)$ $=80+(-70)-(-30)$ $=80+(-40)$$=40$   $#Nấm$