Toán Lớp 6: a) 57 + 725 + 605 – 53
b) (-624) – [ (376 + 235) – 35]
c) 58.75 + 58.50 – 58.25 d) 12.35 + 35.182 – 35.94
e) (55 + 45 + 15) – (15 – 55 + 45)
f) 48.19 + 48.115 + 134.52
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Toán Lớp 6: a) 57 + 725 + 605 – 53
b) (-624) – [ (376 + 235) – 35]
c) 58.75 + 58.50 – 58.25 d) 12.35 + 35.182 – 35.94
e) (55 + 45 + 15) – (15 – 55 + 45)
f) 48.19 + 48.115 + 134.52
Comments ( 2 )
a)57+725+605-53
=782+605-53
=1378-53
=1325
b)(-624) – [ (376 + 235) – 35]
=(-624)-[611-35]
=(-624)-576
=-1200
c)58.75 + 58.50 – 58.25
=58.(75+50-25)
=58.100
=5800
d) 12.35 + 35.182 – 35.94
=35.(12+182-94)
=35.100
=3500
e)(55 + 45 + 15) – (15 – 55 + 45)
=105-5
=100
f) 48.19 + 48.115 + 134.52
=912+5520+6968
=13400
a) 57 + 725 + 605 – 53
=(725+605)-(57+53)
=1330-110
=1220
b) (-624) – [ (376 + 235) – 35]
=(-624) –[611-35]
=-624-576
=-1200
c) 58.75 + 58.50 – 58.25
=(58-50).(75+25)
=8.100
=800
d) 12.35 + 35.182 – 35.94
=35.[182-(12+94)
=35.76
=2660
e) (55 + 45 + 15) – (15 – 55 + 45)
=115-5
=110
f) 48.19 + 48.115 + 134.52
=48.(19+115)+134.52
=48.134+134.52
=134.(48+52)
=134.100
=13400