Page 70 - NUMINO TG_4A
P. 70
04Numbers in Disguise Unit
2 . Insert signs in between the numbers to make each number sentence 2. Have the students use only subtraction
symbols to make number sentences with the
true. given results.
a. 5 4 3 2 1 = 522
b. 5 4 3 2 1 = 21
c. 5 4 3 2 1 = 540
d. 5 4 3 2 1 = 5,431
e. 5 4 3 2 1 = 30
f. 5 4 3 2 1 = 48
4. Numbers in Disguise 33
Problem: Place a and in each to make a number sentence with the given result.
9 8 76 5 43 21 50
Solution: If all of the are filled in with , then the result would be 9 8 76 5 43 21 162.
Since 162 50 112, 112 must be subtracted to get the result. If a is changed to a , the result
will become smaller by twice the number after each . 112 2 56. Find which numbers have a
sum of 56. Place a before each of those numbers whose sum is 56. 8 5 43 56.
Place a before 8, 5, and 43.
Answer: 9 8 76 5 43 21 50
4A Unit 04 053
2 . Insert signs in between the numbers to make each number sentence 2. Have the students use only subtraction
symbols to make number sentences with the
true. given results.
a. 5 4 3 2 1 = 522
b. 5 4 3 2 1 = 21
c. 5 4 3 2 1 = 540
d. 5 4 3 2 1 = 5,431
e. 5 4 3 2 1 = 30
f. 5 4 3 2 1 = 48
4. Numbers in Disguise 33
Problem: Place a and in each to make a number sentence with the given result.
9 8 76 5 43 21 50
Solution: If all of the are filled in with , then the result would be 9 8 76 5 43 21 162.
Since 162 50 112, 112 must be subtracted to get the result. If a is changed to a , the result
will become smaller by twice the number after each . 112 2 56. Find which numbers have a
sum of 56. Place a before each of those numbers whose sum is 56. 8 5 43 56.
Place a before 8, 5, and 43.
Answer: 9 8 76 5 43 21 50
4A Unit 04 053
