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10 + 20 + 50 + 100 + 200.
= 30 + 50 + 100 + 200.
= 80 + 100 + 200.
= 180 + 200.
= 380.
Kích tui nha!!!
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20 + 200 + 80 + 100 + 700
= (20 + 80) + 100 + (200 + 100 + 700)
= 100 + 100 + 1000
= 100 x 2 + 1000
= 200 + 1000
= 1200
mik nhah nhất nha
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a ) x + 234 = 456 - 1
x + 234 = 455
x = 455 - 234
x = 221
b ) x + 20 = 100 - 20
x + 20 = 80
x = 80 - 20
x = 60
1) x + 234 = 456 - 1
x + 234 = 455
x = 455 - 234
x = 221
2) x + 20 = 100 - 20
x + 20 = 80
x = 80 - 20
x = 60
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100 + 20 + 20 + 20 + 20 + 20
= 100 + (20 x 5)
= 100 + 100
= 200
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200 + 800 = 1000
900 + 100 - 20 =980
Ủng hộ nha! :)
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\(19+19+19+19+20+20+4-100\)
\(=19\times4+20\times2+4-100\)
\(=76+40+4-100\)
\(=\left(76+4\right)+\left(40-100\right)\)
\(=80-60\)
\(=20\)
Em ơi lớp 2 em chưa học cái này em nhá
kq là : 91760 nhá em