lesson
Mentally Subtracting Tens from Two-Digit Numbers
Subtract multiples of 10 mentally from any two-digit number by changing only the tens digit.
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Adding and Subtracting Ones and Tens
10 lessons
Goal
Add and subtract one-digit numbers and multiples of ten to and from two-digit numbers using mental and visual methods.
10 lessons
0 of 10 done
- Adding Ones Without Crossing TenUp next
- Adding Ones Crossing Ten by BridgingNot started yet
- Subtracting Ones Without Crossing TenNot started yet
- Subtracting Ones Crossing Ten by Bridging BackNot started yet
- Adding Tens to a Two-Digit Number with Base 10Not started yet
- Mentally Adding Tens to a Two-Digit NumberNot started yet
- Subtracting Tens from a Two-Digit Number with Base 10Not started yet
- Mentally Subtracting Tens from Two-Digit NumbersYou are here
- Finding 10 More and 10 Less on a Hundred SquareNot started yet
- Solving Word Problems with Ones and TensNot started yet
Learning standards covered
UK-NC-MATH-38National Curriculum (England) · Math · 1st Gradeadd and subtract numbers using concrete objects, pictorial representations, and mentally, including: a two-digit number and tens
Open Global Standard:OGM.3.NBT.7
UK-NC-MATH-35National Curriculum (England) · Math · 1st Gradesolve problems with addition and subtraction: applying their increasing knowledge of mental and written methods
Open Global Standard:OGM.3.NBT.8OGM.3.OA.2
OGM.3.NBT.7OGM.3.NBT.8OGM.3.OA.2