Page 69 - NUMINO TG_4A
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Activity 1 and signs
jOb ective Make the given number by using addition or subtraction.
1. Textbook Instructions Activity 1 and Signs
Students will place a or in between 1 . Insert signs in between the numbers to make each number sentence
numbers to make a number sentence that has
the given result. true.
a. 5 + 4 + 3 + 2 + 1 = 15
1. Have the students only add symbols to b. 5 4 + 3 2 + 1 = 87
complete each equation. Guide the students c. 5 4 3 + 2 1 = 564
through a, b, and c to show the solving d. 5 4 3 2 + 1 = 5,433
method. e. 5 4 + 3 2 1 = 375
f. 5 + 4 3 2 + 1 = 438
1a. The sum of the numbers is 15. The sum
can be made by adding 1-digit numbers. 32
1 2 3 4 5 15
1b. The sum of the numbers is a 2-digit
number that is greater than 50. Place an
addition symbol after 54 and find how to split
or combine the rest of the digits to make 87.
54+32+1=87
1c. The sum of the numbers is a 3-digit
number that is greater than 500. Place an
addition symbol after 564 and find out how to
make 564 using the remaining digits.
543 21 564
2. Build Understanding
Problem: The following shows how the digits from 1-9 were used with addition to make different numbers.
Use a similar method and use each of the digits from 1-9 once to make an addition sentence that
equals 99. 1 2 3 4 5 6 7 8 9 45
1 2 3 45 6 7 8 9 81
Solution: Since only addition is used, none of the addends should be a 3-digit number. Make a 2-digit
number closest to 99 and add the rest of the numbers to see what the result is.
1 2 3 4 5 6 7 89 117( ), 1 2 3 4 5 6 78 9 108( ), 1 2 3 4 5 67 8 9 99( )
Answer: 1 2 3 4 5 67 8 9 99
052 NUMINO Teacher s Guide
jOb ective Make the given number by using addition or subtraction.
1. Textbook Instructions Activity 1 and Signs
Students will place a or in between 1 . Insert signs in between the numbers to make each number sentence
numbers to make a number sentence that has
the given result. true.
a. 5 + 4 + 3 + 2 + 1 = 15
1. Have the students only add symbols to b. 5 4 + 3 2 + 1 = 87
complete each equation. Guide the students c. 5 4 3 + 2 1 = 564
through a, b, and c to show the solving d. 5 4 3 2 + 1 = 5,433
method. e. 5 4 + 3 2 1 = 375
f. 5 + 4 3 2 + 1 = 438
1a. The sum of the numbers is 15. The sum
can be made by adding 1-digit numbers. 32
1 2 3 4 5 15
1b. The sum of the numbers is a 2-digit
number that is greater than 50. Place an
addition symbol after 54 and find how to split
or combine the rest of the digits to make 87.
54+32+1=87
1c. The sum of the numbers is a 3-digit
number that is greater than 500. Place an
addition symbol after 564 and find out how to
make 564 using the remaining digits.
543 21 564
2. Build Understanding
Problem: The following shows how the digits from 1-9 were used with addition to make different numbers.
Use a similar method and use each of the digits from 1-9 once to make an addition sentence that
equals 99. 1 2 3 4 5 6 7 8 9 45
1 2 3 45 6 7 8 9 81
Solution: Since only addition is used, none of the addends should be a 3-digit number. Make a 2-digit
number closest to 99 and add the rest of the numbers to see what the result is.
1 2 3 4 5 6 7 89 117( ), 1 2 3 4 5 6 78 9 108( ), 1 2 3 4 5 67 8 9 99( )
Answer: 1 2 3 4 5 67 8 9 99
052 NUMINO Teacher s Guide
