Solving 2-digit multiplication calculations using the distributive law

Solving 2-digit multiplication calculations using the distributive law

Lesson details

Key learning points

  1. In this lesson, we will explore the distributive law in multiplication. We will solve 2-digit multiplication problems using the partitioning method and the compensating method.

Licence

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4 Questions

Q1.
Which equation does not have the answer of 20?
10 + 10
10 x 2
5 x 4
Correct answer: 6 x 4
Others
Q2.
Select the correct calculation for distributive law for the array.
4 + 4 and 4 x 3
Correct answer: 4 x 2 and 4 x 2
5 x 4 and 4 x 2
6 x 3 and 4 x 1
Others
Q3.
Select the calculations that do not represent the array.
1 x 4 and 2 x 4
3 x 4
4 + 4 + 4
Correct answer: 4 x 2
Q4.
Which calculation does the array not represent?
10 x 7 and 3 x 7 and 3 x 7
10 x 7 and 6 x 7
Correct answer: 3 x 10 and 9 x 3
4 x 7 and 2 x 7 and 10 x 7

4 Questions

Q1.
27 + ___ = 9 x 5
12
17
Correct answer: 18
28
Others
Q2.
Which area model shows the compensation method?
Correct answer: Option 1
6 x 3 and 4 x 1
Q3.
Which area model matches the bar model?
Correct answer: Option 1
Option 2
Option 3
Q4.
Which calculations correctly find the value of the array?
Correct answer: 10 x 7 = 70 6 x 7 = 42 70 + 42 = 112
10 x 7 = 90 6 x 7 = 42 42 + 42 = 84
20 x 7 = 140 140 ÷ 2 = 70

Lesson appears in

UnitMaths / Multiplication and division