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27.75 + 25.27 – 150
= 27(75 + 25) - 150
= 27.100 - 150
= 2700 - 150
= 2550
hoặc
27.75 + 25.27 - 150
= 2025 + 675 - 150
= 2700 - 150
= 2550
a) 27.75 + 25.27 - 150.2023⁰
= 27.(75 + 25) - 150.1
= 27.100 - 150
= 2700 - 150
= 2550
b) Sửa đề:
3ˣ + 3ˣ⁺¹ + 16.4 = 2².5²
3ˣ.(1 + 3) + 64 = 4.25
3ˣ.4 + 64 = 100
3ˣ.4 = 100 - 64
3ˣ.4 = 36
3ˣ = 36 : 4
3ˣ = 9
3ˣ = 3²
x = 2
a) 27.75+26.27-150=27(75+25)-150
= 2700-150
= 2550
b) = 12: {390:[500-370]
= 12:{390:130}
=12:3
=4
a)27.75+25.27-150
=27.(75+25)-150
=27.100-150
=2700-150
=2550
b)12:{390:[500-(125+35.7)]}
=12:{390:[500-(125+245)]}
=12:{390:[500-370]}
=12:{390:130}
=12:3
=4
a, 27.75+ 25.27-150 b,
= 27.(75 +25) -150
=27.100-150
=2700-150
=2550
a, 27.75 + 25.27 – 150
= 2025 + 675 – 150 = 2550
b, 142 – [50 – ( 2 3 .10 – 2 3 .5)]
= 142 – [50 – (80 – 40)] = 132
c, 375:{32 – [4+( 5 . 3 2 – 42]} – 14
= 375:{32 – [4+(45 – 42)]} – 14
= 375:(32 – 7) – 14 = 15 – 14 = 1
d, {210:[16+3.(6+3. 2 2 )]} – 3
= [210:(16+3.18)] – 3
= 210 : 70 – 3 = 3 – 3 = 0
a, 27.75 + 25.27 – 150
= 2025 + 675 – 150 = 2550
b, 142 – [50 – ( 2 3 .10 – 2 3 .5)]
= 142 – [50 – (80 – 40)] = 132
c, 375:{32 – [4+( 5 . 3 2 – 42]} – 14
= 375:{32 – [4+(45 – 42)]} – 14
= 375:(32 – 7) – 14 = 15 – 14 = 1
d, {210:[16+3.(6+3. 2 2 )]} – 3
= [210:(16+3.18)] – 3
= 210 : 70 – 3 = 3 – 3 = 0
a,27.75+25.27-150
=27.(75+25)-150
=27.100-150
=2700-150
=2550
c,13.17-256:16+14:7-1
=221-16+2-1
=205+2-1
=208-1
=207
d,18:3+182+3.(51:17)
=18:3+182+3.3
=6+182+9
=188+9
=197
e,15-25:8(100.2)
=15-25:8.200
=15-3,125.200
=15-625
=-610
f,25.8-12.5+170:17-8
=200-60+10-8
=140+10-8
=150-8
=142
a)27.75+25.27=27.(75+25)=27.100=2700
b)19.83+17.19-120=19.(83+17)-120=19.100-120=1900-120=178
c)23.35+23.45+23.20=23.(35+45+20)=23.100=2300
a, 27.75+25.27-150
= 27(75+25) -150
= 27.100-150
= 2700-150=2550
b) 19.83+17.19-120
= 19(83+17)-120
= 19. 100 -120
= 1900 - 120 = 1780
c) 23.35+23.45+23.20
= 23(35+45+20)
= 23.100 = 2300