Page 120 - NUMINO Challenge_A2
P. 120
Type StudyCutting a Piece of Paper with Numbers on It
1
1234
4123
3412
2341
2 Subtract the four numbers in the colored portions from the total sum of the numbers.
Since the numbers 1, 2, 3, and 4 are each written four times, the sum of the numbers is
1 2 3 4 10 10 4 40.
Therefore, the sum of the remaining numbers is 40 4 3 3 2 28.
Problem solving
1 The shape of the unfolded piece of paper is shown below.
2 The sum of all the numbers is 40. The piece of origami paper is folded in half twice and then
cut along the dotted lines. Find the cut-out numbers that add up to 7.
4114 14 23
3223 23 14
2323 23
1414 14
15Answer Key
1
1234
4123
3412
2341
2 Subtract the four numbers in the colored portions from the total sum of the numbers.
Since the numbers 1, 2, 3, and 4 are each written four times, the sum of the numbers is
1 2 3 4 10 10 4 40.
Therefore, the sum of the remaining numbers is 40 4 3 3 2 28.
Problem solving
1 The shape of the unfolded piece of paper is shown below.
2 The sum of all the numbers is 40. The piece of origami paper is folded in half twice and then
cut along the dotted lines. Find the cut-out numbers that add up to 7.
4114 14 23
3223 23 14
2323 23
1414 14
15Answer Key
