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Cogito

Grade 4 Math · Chapter 2 · Lesson 4

Practice Worksheet

Two-Digit by Two-Digit

Four pieces instead of two.

10 problems · about 16 minutes · 4.NBT.B.5

NameDate

Figure — use these to answer the problems

Both numbers are split, so there are four pieces.

204

103

20040

6012

20 × 10200
4 × 1040
20 × 360
4 × 312
24 × 13312

First number24

Second number13

Figure 1

Warm-Up Review

From earlier lessons. Loosen up before the new work.

3 problems

From “The Area Model and Partial Products”
42 × 8 = ?
Answer
From “Multiplying by 10, 100, and 1,000”
8 × 700 = ?
Answer
From “Multiplication as Comparison”
4 times as many as 12 is?
Answer

Warm Up

Straightforward practice. Get the method working first.

3 problems

24 × 13 = ?
Answer
How many partial products does two-digit by two-digit give?
Answer
21 × 14 = ?
Answer

Build It Up

The same ideas with more to keep track of.

1 problem

35 × 12 = ?
Answer

Stretch Yourself

Mixed problems. Work out what kind of question it is before you start.

3 problems

26 × 23 = ?
Answer
The Hall
A hall has 23 rows of 15 seats. How many seats?
Answerseats
The Orchard
An orchard has 32 rows of 24 trees. How many trees?
Answertrees