nyandog50
21.02.2021 •
Mathematics
La façade de la boutique de Guillermo mesure 5 m sur 4 m.
La porte d'entrée, située au centre de ce mur, mesure 1 m sur 2,2 m.
Guillermo veut installer une grande couronne de sapin de chaque côté de la porte.
Si la circonférence extérieure de la couronne est de 329,87 cm,y a-t-il assez d'espace sur la façade de la boutique pour accrocher les deux couronnes ?
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Ответ:
4⋅(a⋅2)
2⋅(4⋅a)
8a
Step-by-step explanation:
(4⋅a)⋅2
4⋅(a⋅2) This is the same by the associative property of multiplication
2⋅(4⋅a) This is the same by the associative property of multiplication and the communicative property of multiplication
4⋅2⋅a⋅2 This brings in an extra 2 so it is not the same.
8a 4*2 = 8 so this is the same
4⋅2+a⋅2 This is the not the same 8+2a is not the same as 8a