Estimation
Using front-end estimation, solve the following:
56 + 33 + 87
160, 170, 180
Solve the following:
32 =
9
What is the square root of 100
10
5 + 3 x 2 =
11
Solve:
84 x 1000
84 000
Using front-end estimation, solve the following:
515 + 312
800 or 820
Solve the following:
72 =
49
What is the square root of 144
12
10 - 4 x 2 + 3 =
5
Solve:
16.2 x 10
162
Using front-end estimation, solve the following:
1298 + 2335 + 1877
5000 or so
What is 53 written as repeated multiplication?
5 x 5 x 5
Approximately what is the square root of 27?
about 5.2
(4 + 1) x (4 - 1) =
15
Solve:
634 ÷ 10
63.4
Using front-end estimation, solve the following:
You went shopping and bought items that cost $2.55, $4.65, $2.80, $3.15 and $7.25. Approximately how much money did you spend?
Solve the following:
24 =
16
Approximately what is the square root of 56
About 7.5
52 - 5 x 2
15
Solve:
85 x 0.01
0.85
Using front-end estimation, solve the following:
Pippa just turned 13 years old. Approximately how many days old is she?
using 10 x 400, she'd be 4000 days old.
using 13 x 400, she'd be 5200 days old.
What exponent represents the following:
3 x 3 x 3 x 3 x 3
35
What two perfect squares does the number 75 fall between?
64 and 81
In BEDMAS, which do you do first: multiplication or division?
Whichever comes first in the expression when read from left to right.
(they don't need to describe this exactly as I have)
Solve:
94.2 ÷ 1000
0.0942