Toán Lớp 6: 2021 + < -247 > + 47 + 2021 chỗ 247 là ngoặc tròn nhé
144 . 23 + < -44 > . 23
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Toán Lớp 6: 2021 + < -247 > + 47 + 2021 chỗ 247 là ngoặc tròn nhé
144 . 23 + < -44 > . 23
Comments ( 2 )
2021 + (-247) + 47 + 2021
= (2021 + 2021) + [(-247) + 47]
= 4042 + (-200)
= 2843
144 . 23 + (-44) . 23
= [144 + (-44)] . 23
= 100 . 23
= 2300
2021+(-247)+47+2021
=(2021+2021)+(-247+47)
=4042-200
=3842
144.23+(-44).23
=23.(144-44)
=23.100
=2300