SME
Grade 4 Math · Problem type
Multiply two-digit numbers
Use this for “Multiply: 38 × 54.”
Diagram
43 × 26: 800 + 60 + 240 + 18 = 1,118.
This is an example. Type your own values to start a new problem.
First factor
×
Second factor
=
Product
Formulas
43 × 26 = 1,118
First factor × second factor = product
Assumptions
•
Break both factors into tens and ones: 43 = 40 + 3 and 26 = 20 + 6.
•
Multiply every part by every part: four partial products. Add them.
•
The area model has a box for each partial product.
Step-by-step
WE KNOW
First factor: 43
Second factor: 26
FIND
product
Step 1 · Find product
43 × 26 = ?
First factor × second factor = product
Break the factors into places. Multiply every part, then add the partial products.
4
3
×
2
6
1
8
3 × 6
2
4
0
40 × 6
6
0
3 × 20
8
0
0
40 × 20
1
1
1
8
43 = 40 + 3
26 = 20 + 6
Product = 1,118 (about 40 × 30 = 1,200)
Check
Put the numbers back in. Both sides should match.
43 × 26 = 1,118 ✓
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Multiply by one-digit and two-digit numbers
Next lesson →
Comparison problems: times as many
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.