1.NBT.5 — 10 More or 10 Less Practice
Practice finding 10 more or 10 less than any two-digit number using mental math, building understanding of place value and how tens change in our number system.
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Three different problem sets — same skill, same layout, fresh numbers.
Preview — Set A
Find 10 more or 10 less than each number mentally and write the answer.
- 1.10 more than 23 =
- 2.10 less than 45 =
- 3.10 more than 57 =
- 4.10 less than 62 =
- 5.10 more than 31 =
- 6.10 less than 78 =
- 7.10 more than 14 =
- 8.10 less than 90 =
- 9.10 more than 46 =
- 10.10 less than 53 =
- 11.10 more than 72 =
- 12.10 less than 37 =
- 13.10 more than 85 =
- 14.10 less than 64 =
- 15.10 more than 19 =
- 16.10 less than 81 =
- 17.10 more than 68 =
- 18.10 less than 29 =
- 19.10 more than 53 =
- 20.10 less than 47 =
What this worksheet covers
Set A of this grade 1 drill sheet holds twenty place value problems on one printable page, with the answer key on the page behind it. What makes this set particular: the numbers run as high as 90. Two problems from the middle of the page — "10 more than 14" and "10 less than 64" — show the range. The sheet sits inside Common Core 1.NBT.5, in the grade 1 Number & Operations in Base Ten strand.
Skills practiced
The grade 1 place value sequence covers tens and ones to 99, ten more and ten less, and comparing two-digit numbers; this page sits inside it. Specifically, the problems practice 10 More or 10 Less Practice. To finish it, a student has to recall the place value facts quickly and accurately, without counting up to them.
About the drill format
This drill runs 20 problems in a steady layout, so the eye never has to hunt for the next one; problem 7, "10 more than 14" shows the level it holds. Repeating one question shape — which digit, what value, round to which place — is how the vocabulary of place value becomes automatic.
Set A, Set B and Set C
Set A is the original sheet, and Sets B and C were derived from it problem by problem: each number became a slot redrawn with the same shape, and every answer was recomputed exactly. Where Set A's problem 11 is "10 more than 72", Set B's is "10 more than 25".
How to use this worksheet
Five focused minutes beats twenty distracted ones at grade 1. Fold this drill in half, do one part of the twenty problems today and the rest tomorrow, and let the student use fingers or counters if they want them. Date the drill before filing it. Set C from six weeks later is the cheapest evidence you have that the place value stuck.
One mistake to watch for
Ten more than 47 is found by counting on by ones. On this grade 1 drill, problem 3 ("10 more than 57") is the kind of item where it shows.
The tens digit has not yet been seen as a thing that can be changed on its own.
Use a hundreds chart and trace the move straight down one row; the ones digit stays put and the student can see it.
Other grade 1 place value formats
The same skill in the other formats available at this grade.
- Timed Drill — Grade 1 Place Value Timed Drill, 60 problems
- Missing Number — Grade 1 Place Value Missing Number, 24 problems
- Mixed Review — Grade 1 Place Value Mixed Review, 24 problems
- Word Problems — Grade 1 Place Value Word Problems, 8 problems
A step either side
The same format one grade down and one grade up — the easier sheet is often the faster fix when this one is not landing.
- Kindergarten Place Value Drill — kindergarten, 20 problems
- 2.NBT.8 — Mentally Subtract 10 or 100 — grade 2, 20 problems
Drill sheets in other grade 1 topics
Free to download, print and photocopy for a whole class: three drill sheets of grade 1 place value, twenty problems each, keys included.