Page 59 - TG_G1_CH6_CHRIS

STEP BY STEP
TIME TO LEARN

The exercise requires children to recall how to use the fact families concept. 1 20 + 30 = 50 50
Introduce exercise 1 to children. Remind children about fact families. Direct 2 50 − 20 = 30
children to use the three numbers in the triangle to write addition facts and
subtraction facts. 3 50 − 30 = 20 20 30
Ask: If the whole is 80 and one part is 70 then what is the other part? 10
When we write the addition as subtraction sentence, we write the whole first as STEP
minuend if one of the parts is 10. Ask: What is the other part? 70 STEP Write the missing numbers.
BY
1 70 + 10 = 80 80
80 − 70 = 10
Another example: 80 − 10 = 70 70 10
After solving the Step-By-Step practice, draw the fact family triangle on the 2 40 + 50 = 90 90
board. Direct children to write addition facts and subtraction facts. 90 − 40 = 50
70 + 20 = 90 20 + 70 = 90 20 40 50
90 - 70 = 20 90 - 20 = 70 90 − 50 = 40
3 40 + 20 = 60 60
70 90
60 − 20 = 40
20 40
60 − 40 = 20
MULTIPLE INTELLIGENCE ACTIVITY 303

Use the Multiple Intelligence Activity for this lesson to enrich and
engage the different learning styles of each child.

PR A C TI C E
P R A C T I C E

Ask children to complete the practice exercises independently. Walk around A. Add or subtract. Write the number.
the class and monitor children progress. 40 90 70
10 30 60 30 50 20
Exercise A assesses using fact family triangle to complete the number
sentence. 1 40 − 30 = 10 4 40 − 10 = 30 7 30 + 10 = 40
2 30 + 60 = 90 5 90 − 30 = 60 8 90 − 60 = 30
Exercise B assesses finding missing numbers using fact families numbers. 3 20 + 50 = 70 6 70 − 50 = 20 9 70 − 20 = 50
B. Solve. Write the missing number, then write the related addition fact.
I got it 50% 1 40 + 10 = 50 4 20 + 40 = 60 7 40 + 10 = 50
If child needs help solving exercises, assist with the use of 50 − 40 = 10 60 − 20 = 40 50 − 40 = 10
manipulatives. Assign it to Reteach Practice Book for additional
support. 2 70 − 40 = 30 5 90 − 20 = 70 8 70 + 20 = 90
I got it 75% 40 + 30 70 20 + 70 = 90 20 + 70 = 90
=
If child correctly solves the exercises independently using
manipulatives, assign the Practice Book for independent 3 60 − 30 = 30 6 80 − 40 = 40 9 50 + 30 = 20
study. Help children solve the exercises independently using 30 + 30 = 60 40 + 40 = 80 30 + 50 = 80
manipulatives 304

I got it 100%
If child solves the exercises independently without the use of
manipulatives, assign the Enriched Practice Book for advanced
independent study.

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