56+44=?
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
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
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
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 !!
![](https://rs.olm.vn/images/avt/0.png?1311)
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) $136^2+36^2-72.136=136^2-2.36.136+36^2=\left(136-36\right)^2=100^2=10000$
![](https://rs.olm.vn/images/avt/0.png?1311)
\(64\times56+81\times44+17\times56\)
\(=\left(64+17\right)\times56+81\times44\)
\(=81\times56+81\times44\)
\(=81\times\left(56+44\right)\)
\(=81\times100\)
\(=8100\)
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!
![](https://rs.olm.vn/images/avt/0.png?1311)
\(23+23-11=22+23-10\)
\(56+21-15=21+56-15\)
\(44+44-22>46+41-26\)
\(23+23-11>22+22-10\)
\(56+21-15=21+56-15\)
\(44+44-22>46+41-26\)
Câu kia sai đừng k
![](https://rs.olm.vn/images/avt/0.png?1311)
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
![](https://rs.olm.vn/images/avt/0.png?1311)
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
=100 k nha
\(56+44\)
=\(100\)