Estimation & Reasonableness
Use leading digit approximation to estimate 498+312
800
Solve 15+12x2
39
Convert 1/4 into a decimal
0.25
What is 10% of $120?
$12
Solve 32.5 × 4 using a calculator
130
Why might you round 2.58 up to 2.6?
it requires accuracy to one decimal place
Which operation solves splitting $48 equally among 6 friends?
Division
2/5 of 50 grams.
20
Calculate the percentage increase from $150 to $180
20%
Perform (120+45) x 2 using a calculator
33
A store has 98 apples in stock. A customer buys around 45 apples. how many apples are left
53
What is 45÷4.5
90
round 0.678 two decimals places
Determine 25 as a percentage of 200
12.5
Use a calculator to convert 2/3 into a decimal
estimate the total of this equation closest thousands
85 X 740
(Remember you are estimating the total not giving the right answer)
62000
3/4 of 200
150
Express 0.60 as a fraction
What is a 15% discount on a $200 item
$30
Why is it important to verify answers when using a calculator
to ensure accuracy in case of input errors
739 x 58 equals what
42,862
125+246+379 mentally and figure out the answer with no calculator
750
Combine 0.30 and 2/5 into a single decimal
0.7
Calculate the 10% on a $350 purchase.
35
When using a calculator, how do you approach multi-step problems efficiently
break them into smaller steps and check each result