Multiplication
Equal groups, arrays, times tables, and multi-digit multiplying.
Strategies
Strategy · 5th gradeWhat does "multiplication as scaling" mean?
Scaling means thinking of multiplication as resizing. Multiplying by a fraction less than 1 shrinks a number, multiplying by a fraction greater than 1 stretc…
Strategy · 3rd grade, 4th grade, 5th gradeWhat is a tape diagram in math?
A tape diagram (also called a bar model) is a rectangle split into equal parts that shows how the numbers in a word problem fit together. For "3/8 of 24 stic…
Strategy · 3rd grade, 4th grade, 5th gradeWhat is the area model for multiplication?
The area model is a way to multiply by drawing a rectangle, splitting each number into tens and ones, and multiplying the smaller pieces. Adding the pieces g…
Articles
Worksheets
Worksheet · 5th gradeArea model: bigger multiplication and division
Three-digit by two-digit multiplication and division with area model boxes already drawn. For 5th graders.
Worksheet · 5th gradeMultiplying as scaling
Predict whether a product is bigger, smaller, or the same without multiplying, then a photo-resizing word problem.
Worksheet · 5th gradeFraction word problems with tape diagrams
Six word problems about fractions of amounts, with space to draw a tape diagram for each. The last one is a challenge.
Worksheet · 3rd grade, 4th gradeArea model multiplication practice
Six multiplication problems with area model boxes already drawn, from 23 × 4 up to 25 × 16. For 3rd and 4th graders learning to multiply bigger numbers.