Question

solve. use the number path and number bonds.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
3 find 13 - 9.
13 - 9
13 - _ = 10
10 - _ = _
so, 13 - 9 = _.
4 find 14 - 7.
14 - 7
14 - _ = 10
10 - _ = _
so, 14 - 7 = _.
5 lamont has 15 grapes. 9 are red. the rest are green. how many grapes are green? circle.
15 - 9
6 grapes
7 grapes
8 grapes

Explanation:

Step1: Solve 13 - 9

Decompose 9

Since \(13-3 = 10\), we decompose \(9\) into \(3\) and \(6\) (\(9=3 + 6\)).

Calculate \(10-6\)

After getting \(13-3=10\), then \(10-6 = 4\). So \(13-9=(13 - 3)-6=10 - 6=4\).

Step2: Solve 14 - 7

Decompose 7

Since \(14 - 4=10\), we decompose \(7\) into \(4\) and \(3\) (\(7 = 4+3\)).

Calculate \(10 - 3\)

After getting \(14-4 = 10\), then \(10-3=7\). So \(14 - 7=(14 - 4)-3=10 - 3=7\).

Step3: Solve 15 - 9 (for the grape problem)

Decompose 9

Since \(15-5 = 10\), we decompose \(9\) into \(5\) and \(4\) (\(9=5 + 4\)).

Calculate \(10-4\)

After getting \(15 - 5=10\), then \(10-4 = 6\). So \(15-9=(15 - 5)-4=10 - 4=6\), which means there are \(6\) green grapes.

Answer:

For \(13 - 9\):

• \(13-3 = 10\)
• \(10-6 = 4\)
• \(13 - 9 = 4\) (the decomposed numbers for \(9\) are \(3\) and \(6\))

For \(14 - 7\):

• \(14-4 = 10\)
• \(10-3 = 7\)
• \(14 - 7 = 7\) (the decomposed numbers for \(7\) are \(4\) and \(3\))

For \(15 - 9\) (grape problem):

• Decompose \(9\) into \(5\) and \(4\)
• \(15-9 = 6\) (so the number of green grapes is \(6\) grapes)