Question

Estimate the difference of 1 1/5 - 9/10

Answer 1

estimate the difference of 1 1/5 - 9/10​

we have

1 1/5=1+1/5=6/5

6/5=12/10

so

12/10-9/10=3/10=0.3

answer is 0.3

estimete

1 1/5 is about 1

9/10=0.9

so

1-0.9=0.10

the estimate is 0.10

steps

Rounded 1 1/5------> 1

we know that

9/10=0.9

so

substitute

1-0.9=0.10