72 * (56 + 44) + 12 * (44 + 56)

= 72 * 100 + 12* 100

= 7200 + 1200

= 8400

72.56 - 12.44 + 72.44 - 12.56 = 72.(56 + 44) - 12.(44 + 56) = 72.100 - 12.100 = 100.(72 - 12) = 100.60 = 6000

\(56+44=100\)

\(44+56=100\)

56 + 44 = 100

44 + 56 = 100

56 + 44 + 44 + 56 = 200

ủng hộ mk nha mọi người

\(56+44+44+56\)

\(=\left(56+44\right)+\left(56+44\right)\)

\(=100+100\)

\(=100.2\)

\(=200\)

56 x 56 + 56 x 44 = 

trả lời :

56 x 56 + 56 x 44

= 56 x ( 56 + 44 )

= 56 x 100

= 5600

vậy kết quả là 5600

\(56\times56+56\times44\)

\(=56\times\left(56+44\right)\)

\(=56\times100\)

\(=5600\)

Chúc ban học tốt !!

a) \(56^2+44^2+2.56.44=56^2+2.56.44+44^2=\left(56+44\right)^2=100^2=10000\)

b) \(36^2+64^2+72.64=36^2+2.36.64+64^2=\left(36+64\right)^2=100^2=10000\)

c) \(136^2+36^2-72.136=136^2-2.36.136+36^2=\left(136-36\right)^2=100^2=10000\)

a) $56^2+44^2+2.56.44=56^2+2.56.44+44^2=\left(56+44\right)^2=100^2=10000$562+442+2.56.44=562+2.56.44+442=(56+44)2=1002=10000

b) $36^2+64^2+72.64=36^2+2.36.64+64^2=\left(36+64\right)^2=100^2=10000$362+642+72.64=362+2.36.64+642=(36+64)2=1002=10000

c) $136^2+36^2-72.136=136^2-2.36.136+36^2=\left(136-36\right)^2=100^2=10000$

\(64\times56+81\times44+17\times56\)

\(=\left(64+17\right)\times56+81\times44\)

\(=81\times56+81\times44\)

\(=81\times\left(56+44\right)\)

\(=81\times100\)

\(=8100\)

Học tốt #

^-<

\(64\cdot56+81\cdot44+17\cdot56\)

\(=56\left(64+17\right)+81\cdot44\)

\(=56\cdot81+44\cdot81\)

\(=81\left(56+44\right)\)

\(=81\cdot100\)

\(=8100\)

hok tốt nhé!

\(23+23-11=22+23-10\)

\(56+21-15=21+56-15\)

\(44+44-22>46+41-26\)

\(23+23-11>22+22-10\)

\(56+21-15=21+56-15\)

\(44+44-22>46+41-26\)

Câu kia sai đừng k 

23 + 23 - 11 > 22 + 22 -10

56 + 21 - 15 = 21 + 56 - 15

44 + 44 - 22 > 46 + 41 - 26

23 + 23 -11 > 22 + 22 - 10

56 + 21 - 11 = 21 + 56 - 15 

44 + 44 - 22  >  46 + 41 - 26

72 . 56 - 12 . 44 + 72 . 44 - 12 . 5

=72 x (56 + 44) + 12 x (44 + 56)

= 72 x 100 + 12 x 100

= 7200 + 1200

= 8400

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