Question

tolong jawab dong besok dikumpulin​

Answer 1

Jawaban:

semoga membantu :)

jika ada yang salah silahkan komentar, saya akan ubah jawaban saya :)

#semangatbelajar!

Answer 2

a. 1449

$$\begin{aligned}7 \times 207 &= 7 \times (200 + 7) \\ &= (7 \times 200) + (7 \times 7) \\ &= 1400 + 49 \\ &= 1449\end{aligned}$$

b. 140

$$\begin{aligned}(7 \times 9) + (7 \times 11) &= 7 \times (9 + 11) \\ &= 7 \times 20 \\ &= 140\end{aligned}$$

c. 6300

$$\begin{aligned}4 \times 21 \times 75 &= 4 \times 75 \times 21 \\ &= 300 \times 21 \\ &= 6300\end{aligned}$$

d. 456

$$\begin{aligned}8 \times 57 &= 8 \times (60 -3) \\ &= (8\times 60) - (8\times 3) \\ &= 480 - 24 \\ &= 456\end{aligned}$$

[tex][/tex]