Number Line to 100Rounding, jumping and estimating on a line marked only in…2nd GradeYou do not need every number marked. Tens are enough to place anything.1FIND THE TENS EITHER SIDE37 sits between 30 and 40.2IS IT NEARER THE LEFT OR THE RIGHT?37 is much closer to 40.3USE 5 AS THE MIDPOINT35 is exactly halfway. Above it, round up.4JUMP IN TENSTo add 30, make three jumps of ten. Far fewer errors thancounting in ones.WORKED48 + 30 → 58, 68, 7863 rounds to 60 · 67 rounds to 70 · 65 rounds to 70Estimating with a number line is how you check an answer is sensiblebefore you trust it.Number Line to 100www.littleactivity.com

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Math · 2nd Grade

Number Line to 100

Rounding, jumping and estimating on a line marked only in tens.

How to use it

Point anywhere on a blank line and ask roughly what number it is.

Free · print-ready PDF · US Letter and A4

Grade
2nd Grade
Ages
7–8
Subject
Math
Pages
1

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