Grade 1 - Math
6 printable versions - Challenge Me - About 5 minutes each
Grade 1 - Math - Challenge Me
Worksheet 1Ten more than 51 is ____
Ten less than 58 is ____
Ten more than 76 is ____
Ten less than 83 is ____
Ten more than 89 is ____
Ten less than 33 is ____
Ten less than 91 is ____
Ten less than 70 is ____
Ten less than 92 is ____
Ten less than 79 is ____
Adding or subtracting ten is a place-value idea. The ones stay the same while the number of tens changes by one. First graders who count by ones can still answer these problems, but that hides the structure they need for later mental addition and subtraction. This worksheet asks children to find ten more, ten less, and the number that sits one ten away from a given value. Base-ten block questions reinforce that a ten rod is being added or removed, not ten random counts recited from memory. Support pages stay between 20 and 60 so ten less remains positive. Standard and challenge pages include larger two-digit numbers and mixed directions. Ask children to cover the ones digit and watch how only the tens digit changes.
Ten more than 46 is 56 because the 4 tens become 5 tens and the 6 ones stay 6.
Changing both digits or counting one by one and losing track.
Change the tens digit by one and keep the ones digit.