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คณิตศาสตร์แสนสนุ ...
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____ x(-5) = 25
-5
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Okay!
(-4) - (-5) = ?
1
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Okay!
(-3) * (-8) = -24 true or false
false (24)
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Okay!
[ 0 × { (-12) × (-12) } ] + 24
24
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Okay!
(-5) × [ 3 + (-4) ]
5
Oops!
Okay!
99 - (-100) = ?
199
Oops!
Okay!
จำนวนตรงข้ามของ -5 คือ ?
5
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Okay!
21 ÷ (-3) = ?
-7
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Okay!
3 x (-4) = ?
-12
Oops!
Okay!
[1*(-7)] + [-3-5] = ?
-15
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Okay!
(-8) x ___ = -64
8
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Okay!
- 11 x ___ = 99
-9
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Okay!
จำนวนตรงข้ามของ 123 คือ ?
-123
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Okay!
จำนวนเต็มแบ่งออกเป็นกี่ประเภท อะไรบ้าง ?
3 ประเภท จำนวนเต็มบวก จำนวนเต็มลบ ศูนย์
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Okay!
[ (-3)(-2)(-1)(0) ] x (-5)
0
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Okay!
30 + (-6) = ?
24
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Okay!
{[ 5 × (-5) ] + (-2) } ÷ (3)
-9
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Okay!
(-15) + (-17) = ?
-32
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Okay!
63 ÷ (-9)
-7
Oops!
Okay!
72 ÷ (-8) = 9 true or false
false (-9)
Oops!
Okay!
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