Estimate
Estimate the difference using front-end estimation:
58.2065 - 26.8214=
About 30
7.43 + 8.56=
15.99
0.586 - 0.492=
0.094
Write the following as an algebraic expression:
the sum of x and 3
x+3 or 3 + x
Evaluate the expression for the given number.
j - 42, when j = 98
56
Estimate the sum using front-end estimation:
75.43 + 62.65 =
About 130
3.2458 + 0.8005=
4.0463
23.594 - 7.008=
16.586
Write the following as an algebraic expression:
0.5 less than k
k - 0.5
Evaluate the expression for the given number.
q + 19, when q = 8.7
27.7
Estimate the sum by rounding (nearest tens):
76.67 + 23.89 + 69.47=
About 170
6.41 + 7 + 3.27=
16.68
$856.79 - 622.03=
$234.76
Write the following as a word expression:
t + 8
the sum of t and 8, t plus 8, t more than 8
Evaluate the expression for the given number.
14.9 - c + d, when c = 0.75 and d = 2.06
16.21
Estimate the difference by rounding (nearest tenths):
0.87 - 0.54=
About 0.40
3465.892 + 2396.087=
5861.979
8745.435 - 230.45=
8514.985
Write the following as a word expression:
10 - a
a less than 10, a subtracted from 10, 10 decreased by a
Write an algebraic expression, then evaluate the expression for the given number.
20.6 decreased by x, when x = 7
20.6 - x; 13.6
Emma has a $10 bill. Use front-end estimation to decide whether she has enough money to buy a sandwich for $7.45 and a drink for $1.35.
Emma has enough to buy a sandwich and a drink because they cost about $8 and $8<$10.
A scientist finds that a sample weighs 0.481g. Then he adds 0.45g of a chemical sample. How much does the sample weigh now?
The sample now weighs 0.931g.
Cooper needs $42.50 for a ticket to an amusement park. He already has $17.75. How much more does Cooper need to buy a ticket?
Cooper needs $24.75 more to buy a ticket.
Write an algebraic expression for the situation. Define your variable.
Kaylee picks 2.5 lbs of strawberries and some blueberries. How many pounds of berries does she pick?
Kieran has x dollars. He spends $16.25 of that amount. What expression represents the amount of money he has now? Evaluate the expression when x = $34.10.
x - $16.25; $17.85