
Жақшаларды ашу. Коэффициент.
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Mathematics
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6th Grade
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Practice Problem
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5 Slides • 11 Questions
1
Жақшаларды ашу. Коэффициент.
6.2.1.5
жақшаны ашу ережелерін білу;
6.2.1.6
коэффициент, ұқсас мүшелер ұғымдарының анықтамаларын білу;
2
3
Ортақ көбейткішті жақша сыртына шығару
Кез келген a, b және c рационал сандары үшін көбейтудің үлестірімділік қасиеті орындалады:
(a + b)c = ac + bc.
1-мысал. (–5 + 7) ⋅ (–2) = 2 ⋅ (–2) = –4;
4
2-мысал. Жақшаларды аш:
–4(–3a + 7); 7a(–5b + 3 – 2m).
Шешуі.
–4(–3a + 7) = –4 ⋅ (–3a) + (–4) ⋅ 7 = 12a + (–28) = 12a – 28. Көбейткіштің таңбасын ескере отырып, жақшаны ашамыз: –4(–3a + 7) = 4 ⋅ 3a – 4 ⋅ 7 = 12a – 28;
7a(–5b + 3 – 2m) = 7a ⋅ (–5b) + 7a ⋅ 3 + 7a(–2m) = –35ab + 21a – 14am,
5
Multiple Choice
(4,36−6,57)+(−7,36−1,43)=?
-10
-11
-12
-13
6
Multiple Choice
2,57−5,34)−(7,57+9,66)=?
-18
-19
-20
-21
7
Multiple Choice
Коэффициентті тап:
−4⋅17c
-68
-50
4
17
8
Multiple Choice
Коэффициентті тап:
−3⋅6x
-3
-18
6
-6
9
Multiple Choice
Коэффициентті тап:
−6⋅1,5y
6
-6
9
-9
10
Multiple Choice
Коэффициентті тап: -2a⋅(−0,3b)
0,6
-0,6
-6
6
11
Multiple Choice
Коэффициентті тап:
−x⋅(−y)⋅(−4p)⋅(−t)
4
-4
1
-1
12
Multiple Choice
0,3(x−5y−2)−0,8(2y−3x)=?
2,7x-3,1y+0,6
2,7x-3,1y-0,6
2,7x+3,1y-0,6
-2,7x-3,1y-0,6
13
Multiple Choice
−6(3x+1)−(x−8)=15
13/19
-13/19
11/19
-11/19
14
Multiple Choice
(3а – 2,4) *(– 5)=?
– 15 + 12a
– 15а -12
15а + 12
– 15а + 12
15
Үй жұмысы: 670
16
Multiple Choice
−6(3x+1)−(x−8)=15
13/19
-13/19
11/19
-11/19
Жақшаларды ашу. Коэффициент.
6.2.1.5
жақшаны ашу ережелерін білу;
6.2.1.6
коэффициент, ұқсас мүшелер ұғымдарының анықтамаларын білу;
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