5. Just do 9 minus 4. 5 plus 4 equals 9
Use BODMAS/BIDMAS/PEDMAS: 9 + 6(22 + 4) = 9 + 6(26) = 9 + 6 × 26 = 9 + 156 = 165
Commutative
144 9+7 = 16 and 9*16 = 144
13
3 times 4 times 9 plus 4 minus (3 times 4)
5. Just do 9 minus 4. 5 plus 4 equals 9
12 divided by 4 plus 2 times 3 = 9
Use BODMAS/BIDMAS/PEDMAS: 9 + 6(22 + 4) = 9 + 6(26) = 9 + 6 × 26 = 9 + 156 = 165
Commutative
In math problems without punctuation such as brackets, the standard convention in to solve from left to right. Therefore, you would solve the problem 15-3 times 4 plus nine like by three actions. 15-3 equals 12; 12 times 4 equals 48; 48 plus 9 equals 57.
20 = 400
4 + 4 + 1 = 9
Commutativity.
144 9+7 = 16 and 9*16 = 144
13
The additive property.