Question

Tính nhanh :

   a) 2.31.12+4.6.42+8.27.3

   b)36.28+36.82+64.69+64.41

Answer 1

a, 24.31 + 24.42 + 24.27 = 24 ( 31+42+27) =24.100 = 2400

b,36.(28+82)+64(69+41) = 36.110 + 64.110 = 110 (36+64) = 110.100= 11000           

Answer 2

a,24.31+24.42+24.27

=24.(31+42+27)

=24.100

=2400

b.36.(28+82)+64.(69+41)

=36.110+110.64

=110.(36+64)

=110.100

=11000

Answer 3

a) = 2400

b) = 11000

Ủng hộ tíck nha ~~~~~~~

Answer 4

a,24.31+24.42+24.27
=24.﴾31+42+27﴿
=24.100
=2400
b.36.﴾28+82﴿+64.﴾69+41﴿
=36.110+110.64
=110.﴾36+64﴿
=110.100
=11000

Học tốt nhé ^_^

Answer 5

A 

[ 2 * 12] * 31 + [ 4 * 6 ] *42 + [ 8 * 3 ] *27 

24 *31 + 24 * 42 + 24* 27

24 * [ 31 + 42 * 27 ]

24 *100

2400

Answer 6

a) 2.31.12 + 4.6.42 + 8.27.3 = 21.31 + 24.42 + 24.27 = 24.(31 + 42 + 27) = 24.100 = 2400

b) 36.28 + 36.82 + 64.69 + 64.41 = 36.(28 + 82) + 64.(69 + 41) = 36.110 + 64.110 = 110.(36 + 64) = 110.100 = 110000

Answer 7

a)2.31.12+4.6.42+8.27.3

=2400

b)36.(28+82)+64.(69+41)

=11000

Answer 8

cau tra loi cua minh la 

a. =2400

b. =11000