Challenge yourself with advanced strategies
What is 12 × 15 using (12 × 10) + (12 × 5)?
If 4 × 25 = 100, what is 8 × 25? ___
8 is double 4.
Using patterns can help solve harder multiplication.
A rectangle's area is 72 sq units, width is 8. What's length?
7 groups of 14 students, then 18 join. How many total? ___
Two steps.
The area formula is length × width.
What is 16 × 5 using halving and doubling?
If ___ × 9 = 108, what's missing? ___
What times 9 is 108?
Breaking numbers into parts makes multiplication easier.
144 ÷ 12 = ?
A farmer has 6 rows of 18 plants, adds 3 rows of 18. Total? ___
Add both groups.
If you know 9 × 8 = 72, then 18 × 8 = 144.
What is 25 × 4?
An array has 156 items in 13 rows. How many columns? ___
Divide total by rows.
Mental math strategies help you calculate faster.
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