สมบัติจำนวนเต็ม

 18   × ____  = 18 

• 18

• -18

• 0

• 1

(-32) ÷____ = (-32)

• 32

• -32

• 0

• 1

_____÷ (-500) = 1

• 500

• -500

• 0

• 1

(-690) × 1 = (-690) มาจากสมบัติอะไร

• a × 1 = a = 1 × a

• a ÷ 1 = a

• a + 0 = a = 0 + a

• a ÷ a = 1

(-201) ÷ (-201) = 1 มาจากสมบัติอะไร

• a ÷ a = 1

• a + 0 = a = 0 + a

• a × 0 = 0 = 0 × a

• 0 ÷ a = 0

38 + _____ = 38

• 38

• -38

• 0

• 1

(-29) × _____ = 0

• 29

• -29

• 1

• 0

0 ÷ 97 = ______

• 0

• 1

• 97

• -97

0 + (-145) = (-145) มาจากสมบัติอะไร

• 0 ÷ a = 0

• a × 0 = 0 = 0 × a

• a + 0 = a = 0 + a

• a × 1 = a = 1 × a

0 × 999 = 0 มาจากสมบัติอะไร

• a × 1 = a = 1 × a

• a + 0 = a = 0 + a

• 0 ÷ a = 0

• a × 0 = 0 = 0 × a