Question

Q1) Round off the number to the nearest ten and do the actual and estimated sums
a) 172 + 721
b) 862 + 386
c) 489 + 912
d) 345 + 619​

Answer 1

a) 170+720=890

b) 860+390=1250

c) 490+910=1400

d) 350+620=970

Answer 2

hey mate

here is your answer .

a)172+721=893

so so here we will round off to nearest hundred so we will check the 10th place so it is 9 so it is near to 10 show the correct answer is 900....

b)862+ 386=1248

hear it would get an estimate of nearest thousand so he would check the hundred place so it is 2 means 2 is lesser than 5 so it would be 1000....

you can do rest be your own because this would improve your mathematics skills which are very important to survive in the present day scenario and please mark me extremely as because I am giving you to do the rest for your own so that you can understand the concept behind estimation

please mark as brainliest ♥️