Grade 1 · Numbers & operations

Ten more / ten less practice

Ten more / ten less is a grade 1 math skill aligned to Common Core standard 1.NBT.C.5: given a two-digit number, mentally find 10 more or 10 less than the number, without having to count. Below are 3 practice questions with answers and step-by-step explanations, drawn from the 5 ten more / ten less problems our math games drill.

CCSS 1.NBT.C.55 questions in the bank
Sample questions

Try 3 for free

Question 1easy

What is 1010 less than 9090?

90−10=8090 - 10 = 80.

Question 2easy

What number is 1010 more than 8383?

83+10=9383 + 10 = 93.

Question 3easy

What is 1010 more than 2525?

25+10=3525 + 10 = 35.

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Math games for Grade 1

Questions like these are served inside our head-to-head math games.

Balloon Pop Math gameBalloon Pop MathPop balloons. Solve math. Win!Beam Team gameBeam TeamFly your saucer over the night farm and beam up a critter for every right answer — first to 12 wins.Blaster Gate gameBlaster GateBlast through the wall. First to clear wins.Blitz Tanks gameBlitz TanksSolve math to load shells. Out-think the battalion. Last math standing wins.
Tests that cover ten more / ten less:
i-Ready
More Grade 1 skills:
Subtraction facts within 20Missing addendAddition facts within 20All Grade 1 practice →

Drill it inside a game.

The free placement test finds your level, then every match serves ten more / ten less questions at exactly the right difficulty.