## Bài 1 : a, $10^{2}$ – [ 60 : ( $5^{6}$ : $5^{4}$ – 3 x 5 ) ] b , 50 – [ 50 – $2^{3}$ x 5 ) : 2 + 3 ] c, 10 – [ ( $8^{2}$ – 48 ) x 5 + ( $2^{3}$

Question

Bài 1 :
a, $10^{2}$ – [ 60 : ( $5^{6}$ : $5^{4}$ – 3 x 5 ) ]
b , 50 – [ 50 – $2^{3}$ x 5 ) : 2 + 3 ]
c, 10 – [ ( $8^{2}$ – 48 ) x 5 + ( $2^{3}$ x 10 + 8 ) ] : 28

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3 tuần 2021-07-06T08:46:33+00:00 2 Answers 0 views 0

1. Đáp án:

Giải thích các bước giải:

a ) 10^2 -[ 60: ( 5^6 :5^4 – 3.5)

= 100 – [ 60 : ( 5^2 -15)

=100 – [ 60 : ( 25-15)]

=100 – [ 60 : 10 ]

=100-6

=94

b) 50- [ 50 – 2^3 . 5 ) :2+3

=50 -(50 -8 .5 ): 5

= 50 – ( 50 -40 ):5

=50 – 10 :5

= 50-2

=48

c) 10 -[ ( 8^2-48 ).5 + ( 2^3 . 10 +8 )] :28

=10 – [ (64 -48 ).5 + ( 8 .10 +8 )] :28

=10 – [ 80 + 88 ] :28

=10 – 6

= 4

2. Đáp án:

A, 100 – [60 : ( 5² – 3 x5 )]

100 – [60: ( 25 – 15 ) ]

100 -(60:10 )

100-6 = 94

B ,  50 – [ 50 -( 8 x5 )  : 2 + 3 ]

= 50 – 10 : 2 + 3

50 – 5 + 3 = 48

C

10 – [(  64-48) x5 + (8 x10 + 8 ) ] : 28

10 – [ 80 + 88 ] : 28

10 – 6 = 4