Toán Lớp 6: a) (-26) + 16 + (-34) + 26
b) (-4) . 25 + 120 : 6
c) 24 . 82 + 24 . 18 – 100 d
) (-12) + 3.[39 – (5 – 2)2]
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Toán Lớp 6: a) (-26) + 16 + (-34) + 26
b) (-4) . 25 + 120 : 6
c) 24 . 82 + 24 . 18 – 100 d
) (-12) + 3.[39 – (5 – 2)2]
Comments ( 2 )
Giải đáp:
a) (-26) + 16 + (-34) + 26
= (-26) + 26 + 16 + (-34)
= 0 + 16 + (-34)
= – 18
b) (-4) . 25 + 120 : 6
= (-100) + 20
= -80
c) 24.82 + 24.18 – 100
= 24.(82 + 18) – 100
= 24.100 – 100
= 2400 – 100
= 2300
d) (-12) + 3.[39 – (5 – 2)2]
= (-12) + 3.[39 – 3^2]
= (-12) + 3.[39 – 9]
= (-12) + 3 . 30
= (-12) + 90
= 78
a) (-26)+16+(-34)+26
=[(-26)+26]+[16+(-34)]
=0+(-18)
=-18
b)(-4).25+120:6
=-100+20
=-80
c) 24.82+24.18-100
=24(82+18)-100
=24.100-100
=2400-100
=2300
d)(-12)+3[39-(5-2)^2]
=(-12)+3[39-3^2]
=(-12)+3[39-9]
=(-12)+3.30
=(-12)+90
=78
\text{# Mạc}