Page 211 - NUMINO TG_3A
P. 211
Activity 1 Multiply and Divide
jOb ective Solve different types of problems using a fact family.
1. Textbook Instructions Activity 1 Multiply and Divide
Have students look at the 3 numbers and find 1 . Write all the multiplication and division sentences using the given
the fact family. Have them solve the word
problems using the relationship between the 3 numbers.
multiplication and division sentences.
a. 3, 4, 12 b. 4, 8, 32
1. Have students look at the 3 numbers and
find 4 sentences that belong to the fact 3 4 12 4 8 32
family. 4 3 12 8 4 32
12 3 4 32 4 8
Have students ask questions like the 12 4 3 32 8 4
following to revise the relationship between
multiplication and division sentences. c. 7, 9, 63 d. 5, 11, 55
Example: 1a. 7 9 63 5 11 55
Which division sentence relates to the 9 7 63 11 5 55
multiplication sentence 3 4 12? 63 7 9 55 5 11
12 3 4 63 9 7 55 11 5
Which division sentence relates to the
multiplication sentence 4 3 12? e. 7, 12, 84 f. 3, 15, 45
12 4 3
7 12 84 3 15 45
12 7 84 15 3 45
84 7 12 45 3 15
84 12 7 45 15 3
120
2. Build Understanding
Fact Family and Inverse Operations
The division sentence a b c is an inverse operation of the multiplication sentence b c a.
For example, the division sentence 8 4 2 is an inverse operation of the multiplication sentence 4 2 8.
You can use symbols (A, B) to formulate a rule about a fact family, as shown on the right.
194 NUMINO Teacher s Guide
jOb ective Solve different types of problems using a fact family.
1. Textbook Instructions Activity 1 Multiply and Divide
Have students look at the 3 numbers and find 1 . Write all the multiplication and division sentences using the given
the fact family. Have them solve the word
problems using the relationship between the 3 numbers.
multiplication and division sentences.
a. 3, 4, 12 b. 4, 8, 32
1. Have students look at the 3 numbers and
find 4 sentences that belong to the fact 3 4 12 4 8 32
family. 4 3 12 8 4 32
12 3 4 32 4 8
Have students ask questions like the 12 4 3 32 8 4
following to revise the relationship between
multiplication and division sentences. c. 7, 9, 63 d. 5, 11, 55
Example: 1a. 7 9 63 5 11 55
Which division sentence relates to the 9 7 63 11 5 55
multiplication sentence 3 4 12? 63 7 9 55 5 11
12 3 4 63 9 7 55 11 5
Which division sentence relates to the
multiplication sentence 4 3 12? e. 7, 12, 84 f. 3, 15, 45
12 4 3
7 12 84 3 15 45
12 7 84 15 3 45
84 7 12 45 3 15
84 12 7 45 15 3
120
2. Build Understanding
Fact Family and Inverse Operations
The division sentence a b c is an inverse operation of the multiplication sentence b c a.
For example, the division sentence 8 4 2 is an inverse operation of the multiplication sentence 4 2 8.
You can use symbols (A, B) to formulate a rule about a fact family, as shown on the right.
194 NUMINO Teacher s Guide
