Question

TÍNH NHANH

a) 58.75+58.50-58.25       

b)27.39+27.63-2.27

c)128.46+128.32+128.22

Answer 1

a)58.75+58.50-58.25

=58.(75+50-25)

=58.100

=5800

b)27.39+27.63-2.27

=27.(39+63-2)

=27.100

=2700

c)128.46+128.32+128.22

=128.(46+32+22)

=128.100

=12800

Answer 2

a) 58.75 + 58 . 50 - 58 . 25
= 58 . ( 75 + 50 - 25 )
= 58 . 100
= 5800
b) 27 . 39 + 27 . 63 - 2 . 27
= 27 . ( 39 + 63 - 2 )
= 27 . 100
= 2700
c) 128 . 46 + 128 . 32 + 128 . 22
= 128 . ( 46 + 32 + 22 )
= 128 . 100
= 12800
 

Answer 3

a)   58.75 + 58.50 - 58.25 = 58(75 + 50 - 25) = 58.100 = 5800

b)   27.39 + 27.63 - 2.27 = 27(39 + 63 -2) = 27.100 = 2700

c)    128.46 + 128.32 +128.22 = 128(46 + 32 + 22) = 128.100 = 12800

Answer 4

58.75+58.50-58.25=58.(75+50+25)=58.(125+25)=58.150=8700

Answer 5

TÍNH NHANH

a) 58.75+58.50-58.25       

= 58 . ( 75 + 50 - 25 )

= 58 . 100

= 5800

b)27.39+27.63-2.27

= 27 . ( 39 + 63 - 2 )

= 27 . 100

= 2700

c)128.46+128.32+128.22

= 128 . ( 46 + 32 + 22 )

= 128 . 100

= 12800

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Answer 6

a) =58*(75+50-25)

=58*100

=5800

b) =27*(39+63-2)

=27*100

=2700

c) =128*(46+32+22)

=128*100

=12800

Answer 7

a>58.{75+50-25}

=58.100

=5800

b>27.{39+63-2}

=27.100

=2700

c>128.{46+32+22}

=128.100

=12800

Answer 8

a,

58.75+58.50-58.25

= 58.(75+50-25)

= 58.        100

= 5800

b,

27.39+27.63-2.27

=27.( 39+63-2)

= 27.        100

= 2700

c,

128.46+128.32+128.22

= 128 .( 46+32+22)

= 128   .        100

=             12800

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