Answer:

1. 1×65=65
2.43×(4+7)=(43×11)+(0×7)
3.17+(18+19)=(17+18)+19
4.78×0=0

5.32×15=15×32

Step-by-step explanation:

Explanation for number:
1. when a number is multiplied to one(1) it stays the same
2. following PEMDAS, you will add four(4) and seven(7) which is equal to eleven(11) and multiply eleven(11) to fourty three(43) you will get four hundred seventy three(473). On the other side, when you multiply fourty three(43) and eleven(11) it is equal to four hundred seventy three(473) and add seven(7) multiplied to zero(0) which is zero(0) you will get four hundred seventy three(473).
3.When you add eighteen(18) and nineteen(19) you will get thirty seven(37) and when you add thirty seven(37) to seventeen(17) you will get fifty four(54). And to the other side when you add seventeen(17) to eighteen(18) you will get thirty five(35) and when you add thirty five(35) to nineteen(19) you get fiifty four(54)

4. When a number is multiplied to zero(0) it is equal to zero(0)

5. When you multiple thirty two(32) to fifteen(15) you will get forty eight (48) and the other side is vise versa but same answer


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