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
Finn 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.
Finn 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.
Thomas needs $42.50 for a ticket to an amusement park. He already has $17.75. How much more does Thomas need to buy a ticket?
Thomas 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?
Ellie and Josie have x dollars. They spend $16.25 of that amount. What expression represents the amount of money they have now? Evaluate the expression when x = $34.10.
x - $16.25; $17.85