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Practice Time 3A

1. Multiply the following.

(a) tth th H t O (b) tth th H t O (c) tth th H t O

3 7 2 4 6 7 8 2 7 2 8 9
× 3 × 7 × 9

2. Find the product of the following.

(a) 1234 × 4 (b) 6169 × 3 (c) 2341 × 4 (d) 7641 × 7
(e) 9811 × 9 (f) 8765 × 5 (g) 9874 × 8 (h) 6874 × 6

Multiplication by a 2-Digit nuMber

Let us first revise the multiplication of a 3-digit number by a 2-digit number, then
extend the learning to find the multiplication of a 4-digit number by a 2-digit number.

Example 1: Multiply 462 by 26. tth th H t O

Solution: Step 1: Write the multiplicand 462 4 6 2 Multiplicand
and multiplier 26 in proper × 2 6 Multiplier
place value columns. 2 7 7 2 462 × 6 ones

Step 2: Multiply 462 by 6 ones. + 9 2 4 0 462 × 2 tens
462 × 6 ones = 2772 ones 1 2 0 1 2 Product
Step 3: Multiply 462 by 2 tens.
462 × 2 tens = 9240 ones Challenge Question

Step 4: Add both partial products. Without performing the multiplication,
2772 + 9240 = 12012 determine if the product of 7289 × 9

Thus, 462 × 26 = 12,012. ends in an odd or even number.

Math Insight
Š The number that is multiplied is called the multiplicand. 12 × 6 = 72
Š The number by which we multiply is called the multiplier.
Š Multiplicand and multiplier are commonly called factors of the product. Multiplicand Product
Š The result of the multiplication is called the product. Multiplier

Multiplication of a 4-digit Number by a 2-digit Number

Example 2: Multiply 3231 by 12.

Solution: Step 1: Write the multiplicand 3231 tth th H t O
and the multiplier 12 in the 3 2 3 1
proper place value columns. × 1 2

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