➕ 1st Grade Math · Unit 4
Adding and Subtracting Tens
13 short narrated lessons in 3 chapters, each with pictures, a quiz with a hint and a second try, and an explanation for every answer.
Standards: 1.NBT.C.5 1.NBT.C.4 1.NBT.C.6
What your child will learn
Ten more and ten less
- Ten More!Find 10 more than a two-digit number in your head.
- Ten Less!Find 10 less than a two-digit number in your head.
- Tens on the Hundred ChartUse a hundred chart to find 10 more and 10 less by moving down and up.
- Ten More and Ten Less Review ReviewReview finding 10 more and 10 less than a number.
Adding within 100
- Adding TensAdd multiples of ten like 30 plus 40 using tens.
- Adding Tens to a NumberAdd a multiple of ten to a two-digit number, like 34 plus 20.
- Adding Ones to a NumberAdd a one-digit number to a two-digit number, like 43 plus 5.
- Making a New TenAdd numbers like 27 plus 6 and make a new ten when the ones add up to ten or more.
- Adding Within 100 Review ReviewReview adding tens and ones within 100.
Subtracting tens
- Subtracting TensSubtract multiples of ten like 70 minus 30 using tens.
- Subtracting Tens on a ChartUse a hundred chart to subtract tens from multiples of ten.
- Explaining Your ThinkingExplain how you used tens to solve a subtraction problem.
- Subtracting Tens Review ReviewReview subtracting multiples of ten.
Try a question from this unit
From the lesson “Ten More!”
What is ten more than 34?
Show the answer
[object Object]. One more ten turns 3 tens into 4 tens, so it is 44.
Hint kids see after a wrong try: “Make the tens digit one bigger and keep the ones.”
Key words
- ten more
- ten less
- hundred chart
- tens
- add
- ones
- new ten
- subtract
- chart
- explain
Try these lessons in Kids Shelf
Narrated lessons, pictures and quizzes for every grade from K to 8. Works offline.
