Round the decimal number to the underlined place value.
Estimate the given sum or difference.
1/7 + 2/6
9/8 – 2/11
231/5 – 191/2
168.7 – 57.3
Use front–end estimation to estimate the sum.
Estimate the sum by clustering.
$5.43 + $5.05 + $4.95 + $5.29
Estimate the sum. State the method you used for estimation.
$17.02 +$13.98 + $4.48
If James have to buy two presents with $18.90 and finds that the cost of the one item is $10.53 and another item is $8.41, give the estimation strategy that will help him to decide whether he have enough money to buy both.
