Toán (-16) +(-209)+(-14)+209 (-12)+(-13)=36+(-11) -16+24+16-34 25+37-48-25-37 09/07/2021 By Skylar (-16) +(-209)+(-14)+209 (-12)+(-13)=36+(-11) -16+24+16-34 25+37-48-25-37
a.(-16) +(-209)+(-14)+209 =-16-209-14+209 =-(16+14)-(209-209) =-20-0 =-20 b.(-12)+(-13)+36+(-11) =-12-13+36-11 =-(12+13+11)+36 =-36+36 =0 c.-16+24+16-34 =-(16+34)+(24+16) =-50+40 =-10 d.25+37-48-25-37 =(25-25)+(37-37)-48 =0+0-48 =-48. Trả lời
`(-16) + (-209) + (-14) + 209` `= (-16 – 14) + (209 – 209)` `= -30` . `(-12) + (-13) + 36 + (-11) – 16+24 + 16 – 34` `= (-12 – 13 – 11) + (36 + 24) – (16+34)` `= -36 + 60 – 50` `= -26` . `25+37 – 49-25-37` `= (25-25) + (37-37) – 49` `= -49` Trả lời
a.(-16) +(-209)+(-14)+209
=-16-209-14+209
=-(16+14)-(209-209)
=-20-0
=-20
b.(-12)+(-13)+36+(-11)
=-12-13+36-11
=-(12+13+11)+36
=-36+36
=0
c.-16+24+16-34
=-(16+34)+(24+16)
=-50+40
=-10
d.25+37-48-25-37
=(25-25)+(37-37)-48
=0+0-48
=-48.
`(-16) + (-209) + (-14) + 209`
`= (-16 – 14) + (209 – 209)`
`= -30`
.
`(-12) + (-13) + 36 + (-11) – 16+24 + 16 – 34`
`= (-12 – 13 – 11) + (36 + 24) – (16+34)`
`= -36 + 60 – 50`
`= -26`
.
`25+37 – 49-25-37`
`= (25-25) + (37-37) – 49`
`= -49`