Penjelasan dengan langkah-langkah:

1. -2 -1 0 1

2. -10+15-8 = -3

3. mula² : -10 ⁰C dimasak = 40 menit

tiap 2 menit naik 5 ⁰C maka kenaikan suhu = 40/2

= 20 × 5⁰C

= 100 ⁰C

suhu daging sekarang = -10 + 100 = 90⁰C

4. = 5 ⭕ = -12 ⬜ = 27

⬜ - ⭕ + = 27 - (-12) + 5 = 27+ 12 + 5 = 44

5. 4200 - (500÷50)+(80×8)

4.200 - 10 + 640 = 4.830

6. 5/8 perempuan .. maka

laki-laki = 1 - 5/8 = 8/8 - 5/8 = 3/8

perempuan = 5/8 × 32 = 20

laki² = 3/8 × 32 = 12

7. 2,3 - 3/5 ÷ 40% =

23/10 - 3/5 : 40/100

23/10 - (3/5× 100/40)

= 23/10 - 3/2

= 23/10 - 15/10

= 8 /10 = 0,8

8. juring

9. kll = 157 r = ?

kll = 2 × phi × r

157 = 2 × 22/7×r

157 = 44/7 × r

157× 7/44 = r

r = 24, 97

10. L = 3/4 × phi × r²

L = 3/4 × 3,14 × 20²

L = 3/4 × 1256

L = 942