SME
Grade 1 Math · Number & Base Ten
Add within 100 using place value
Use this for “What is 36 + 7? What is 36 + 20?”
Picture
Rods are tens, small cubes are ones.
This is an example. Type the numbers from your problem to start.
First number
+
Number to add
=
Total
Number sentences
36 + 7 = 43
43 − 7 = 36
Good to know
•
Add a small number like 7, or tens like 20, to a number like 36.
•
Add tens to tens and ones to ones. Make a ten when the ones reach 10.
Step-by-step
WE KNOW
First number: 36
Number to add: 7
FIND
total
Step 1 · Find total
36 + 7 = ?
Make the next ten. Then add the rest.
36 + 4 = 40
40 + 3 = 43
Total: 43
Check
Put the numbers back in. Both sides should match.
36 + 7 = 43 ✓
43 − 7 = 36 ✓
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