Find the guides the number sits between, then ask which one it is closer to. 65 is a bit past 50, so it goes a little over halfway from 50 to 100.
estimatea close guess
number linenumbers in order along a line
halfwaythe middle, the same distance from both ends
closera shorter distance away
Watch for: Putting 65 near the 6 or 60 mark without thinking of 50 and 100. Marking 5 at 50, or 95 near 50, by reading only one digit. Placing a number on the wrong side of 50.
At home: Draw a line on paper, mark 0 and 100 at the ends and 50 in the middle. Take turns marking a number and checking how close it is.
Sample sheet and answer key
Freddie's Frog Pond
Grade 1 · Estimating on a number line · 1.NOS.B.6
NameDate
Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!
Where is the arrow?
Use 10, 50 and 100 to help. Circle a good guess for each arrow.
A154577B316085C152479
A457478B156886C283865
Mark the numbers
Draw an arrow where each number goes.
Mark 65, 95 and 40
Which guide is closer?
Circle the closer number.
16 is closer to1050
68 is closer to50100
25 is closer to1050
65 is closer to50100
96 is closer to50100
19 is closer to1050
Sheet
Freddie's Frog Pond
Grade 1 · Estimating on a number line · 1.NOS.B.6
Answer key
Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!
Where is the arrow?
Use 10, 50 and 100 to help. Circle a good guess for each arrow.
A154577B316085C152479
A457478B156886C283865
Mark the numbers
Draw an arrow where each number goes.
Mark 65, 95 and 40
Which guide is closer?
Circle the closer number.
16 is closer to1050
68 is closer to50100
25 is closer to1050
65 is closer to50100
96 is closer to50100
19 is closer to1050
Answer key
New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.
