Question

Observe the pattern and fill in the blanks to make the statement true:

7 × 4 = 28
7 × 3 =______ = 28 – 7
7 × 2 =______ =____ – 7
7 × 1 = 7  =____ -7
7 × 0 =______ =____ -______
7 × – 1 = -7 =__ -______
7 × – 2 =___ =______ -_____
7 × – 3_____ =____ -______

Answer 1

21, 14, 21, 14, 0,  7,  7, 0, 7, -14, -7, 7, -21, -14, 7:

7 × 3 = 28 – 7
7 × 2 = 14 = 21 – 7
7 × 1 = 7  = 14 – 7
7 × 0 = 0 = 7 – 7
7 × (-1) = -7 = 0 – 7
7 × (- 2) = – 14 = -7 – 7
7 × (- 3) = -21 = – 14 – 7