Question

Use mental math to find the sum of 43 and 57

Answer 1

Answer:

100

Step-by-step explanation:

43+57=100

I added 3+7=10

Then 40+50=90 and added them

90+10=100

Answer 2

Answer: 100

Step-by-step explanation:

You know that 3+7=10

You know that 40+50=90

90+10=100