Page 78 - NUMINO Challenge_M2
P. 78
Problem solving Key Point
1 The numbers from 1 to 10 must be used only The two numbers
that have a sum of 5
once to complete the expressions below. 5, 9, are (1, 4) and (2, 3).
and 10 are already used. When completing the
expression, which number cannot be used?
+ =9
+ =5
+ = 10
2 Complete the expression by using the given Find ways where the
sum of the first two
number cards in various ways. Note that each numbers equals the
number card can only be used once. number that is
subtracted.
23 678 9 (1+3-4=0)
+ - =0
75Operations
1 The numbers from 1 to 10 must be used only The two numbers
that have a sum of 5
once to complete the expressions below. 5, 9, are (1, 4) and (2, 3).
and 10 are already used. When completing the
expression, which number cannot be used?
+ =9
+ =5
+ = 10
2 Complete the expression by using the given Find ways where the
sum of the first two
number cards in various ways. Note that each numbers equals the
number card can only be used once. number that is
subtracted.
23 678 9 (1+3-4=0)
+ - =0
75Operations
