Toán Lớp 6: bài 1: phá ngoặc rồi tính
a,(-48+27+56)-(48+27+36)
b,-(-23+57)-(-57+33)
c,(-98+12-159)-[12-(-41)]
d,-(2)mũ2+(-3)mũ3-[-27-(-46)]
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Toán Lớp 6: bài 1: phá ngoặc rồi tính
a,(-48+27+56)-(48+27+36)
b,-(-23+57)-(-57+33)
c,(-98+12-159)-[12-(-41)]
d,-(2)mũ2+(-3)mũ3-[-27-(-46)]
Comments ( 2 )
a,(-48+27+56)-(48+27+36)
=-48+27+56-48+27+36
=-48×2+27xx2+56+36
=-96+54+92=(92-96)+54
=-4+54
=50
b,-(-23+57)-(-57+33)
=23-57+57-33
=23-33+0
=-10
c,(-98+12-159)-[12-(-41)]
=-98+12-159-12-41
=-159-41-12+12-98
=-200-0-98
=-298
d,(-2)^2+(-3)^3-[-27-(-46)]
=4-27+27-46
=4-46+0
=-42
a,(-48+27+56)-(48+27+36)
= -48 + 27 + 56 – 48 – 27 – 36
= (-48-48) + (27-27) + (56-36)
= -96 + 20
= -76
b,-(-23+57)-(-57+33)
= 23 -57 + 57 -33
= 23 -33
= -10
c,(-98+12-159)-[12-(-41)]
= -98+12-159 – 12 -41
= -98 -159 -41
=-298
d,-(2)^2+(-3)^3 – [-27-(-46)]
= 2^2 – 3^3 + 27 – 46
= 4 -27 + 27 – 46
= -42