1)(-3 1/4+2 1/6)(-2 2/11)-(-5/6+1 3/5)(-4/5-1,2)=(-13/4+13/6)(-24/11)-(-5/6+8/5)(-4/5-6/5)=-13/12-(-24/11)-(-5/6+8/5)(-4/5-6/5)=-13/12(-24/11)-23/30(-4/5-6/5)=-13/12(-24/11)-23/30(-2)=13/12×24/11+23/30×2=13×2/11+23/30×2=13×2/11+23/15=26/11+23/15=643/165
2)(-2 2/5-1 1/3)(-1 17/28)+(5 2/3-8 3/4)(-8 3/4+5 2/3)=-(2 2/5-1 1/3)(-45/28)+(17/3-35/4)(-35/4+17/3)=-((2+1)+(2/5+2/3))(-45/28)+(27/3-35/4)(-35/4+17/3)=-((2+1)(2/5+2/3))(-45/28)-37/12(-37/12)=-(3+11/15)(-45/23)-37/12(-37/12)=-(3+11/15)(-4/28)+37/12×37/12=-(3+11/15)(-4/28)+1369/144=-3 11/15(-4/28)+1369/144=-56/15(-4/28)+1369/144=56/15×4/28+1369/144=2/15×45+1369/144=2×3+1369/144=6+1369/144=2233/144
Відповідь:
304628490144÷34 = 8959661474.(8235294117647058)
- 3 0 4 6 2 8 4 9 0 1 4 4 3 4
2 7 2 8 9 5 9 6 6 1 4 7 4 . 8 2 3 5 2 9 4 1 1 7 6 4 7 0 5 8 34 × 8 = 272
- 3 2 6 304 - 272 = 32
3 0 6 34 × 9 = 306
- 2 0 2 326 - 306 = 20
1 7 0 34 × 5 = 170
- 3 2 8 202 - 170 = 32
3 0 6 34 × 9 = 306
- 2 2 4 328 - 306 = 22
2 0 4 34 × 6 = 204
- 2 0 9 224 - 204 = 20
2 0 4 34 × 6 = 204
- 5 0 209 - 204 = 5
3 4 34 × 1 = 34
- 1 6 1 50 - 34 = 16
1 3 6 34 × 4 = 136
- 2 5 4 161 - 136 = 25
2 3 8 34 × 7 = 238
- 1 6 4 254 - 238 = 16
1 3 6 34 × 4 = 136
- 2 8 0 164 - 136 = 28
2 7 2 34 × 8 = 272
- 8 0 280 - 272 = 8
6 8 34 × 2 = 68
- 1 2 0 80 - 68 = 12
1 0 2 34 × 3 = 102
- 1 8 0 120 - 102 = 18
1 7 0 34 × 5 = 170
- 1 0 0 180 - 170 = 10
6 8 34 × 2 = 68
- 3 2 0 100 - 68 = 32
3 0 6 34 × 9 = 306
- 1 4 0 320 - 306 = 14
1 3 6 34 × 4 = 136
- 4 0 140 - 136 = 4
3 4 34 × 1 = 34
- 6 0 40 - 34 = 6
3 4 34 × 1 = 34
- 2 6 0 60 - 34 = 26
2 3 8 34 × 7 = 238
- 2 2 0 260 - 238 = 22
2 0 4 34 × 6 = 204
- 1 6 0 220 - 204 = 16
1 3 6 34 × 4 = 136
- 2 4 0 160 - 136 = 24
2 3 8 34 × 7 = 238
- 2 0 0 240 - 238 = 2
1 7 0 34 × 5 = 170
- 3 0 0 200 - 170 = 30
2 7 2 34 × 8 = 272
2 8 300 - 272 = 28
Покрокове пояснення:
1,5x+4,11-0,11=7
1,5x+4=7
1,5x=7-4
1,5x=3
x=3:1,5
x=2