Toán a/(-13)-(+9).(-7) b/85.(17-35)-18.(40-55) c/(-11)^2.4+2^6:2 15/07/2021 By Sarah a/(-13)-(+9).(-7) b/85.(17-35)-18.(40-55) c/(-11)^2.4+2^6:2
a. $(-13)-(+9).(-7)=-13-(-63)=-13+63=50^{}$ b. $85.(17-35)-18.(40-55)=85.(-18)-18.(-15)=-18.(85-15)=-18.70=-1260^{}$ c. $(-11)^2.4+2^6:2=121.4+64:2=121.4+32=484+32=516^{}$ Trả lời
a.(-13)-(+9).(-7) =(-13)-9.(-7) =(-13)+63 =50 b.85.(17-35)-18.(40-55) =85.(-18)-18.(-15) =(-18)(85-15) =(-18).70 =-1260 c.(-11)².4+$2^{6}$:2 =(-11)².4+$2^{6}$:2 =121.4+$2^{5}$ =484+32 =516. Trả lời
a. $(-13)-(+9).(-7)=-13-(-63)=-13+63=50^{}$
b. $85.(17-35)-18.(40-55)=85.(-18)-18.(-15)=-18.(85-15)=-18.70=-1260^{}$
c. $(-11)^2.4+2^6:2=121.4+64:2=121.4+32=484+32=516^{}$
a.(-13)-(+9).(-7)
=(-13)-9.(-7)
=(-13)+63
=50
b.85.(17-35)-18.(40-55)
=85.(-18)-18.(-15)
=(-18)(85-15)
=(-18).70
=-1260
c.(-11)².4+$2^{6}$:2
=(-11)².4+$2^{6}$:2
=121.4+$2^{5}$
=484+32
=516.