tolong. buat bsk ulangan

1) 40 + 37 = 37 + 40 ( B )

2) 123 × 362 = 44.526
taksiran = 40.000 ( A )

3) 20 = 2² × 5
30 = 2 × 3 × 5
kpk = 2² × 3 × 5 = 60 ( C )

4) 24 = 2³ × 3
40 = 2³ × 5
fpb = 2³ = 8 ( D )

5) 149 + 25 ÷ 5 - 30
= 149 + 5 - 30
= 124 ( A )

6) - 20 + 36 ÷ 4 - 12 × 20
= - 20 + 9 - 240
= - 251 ( C )

7) √225 + 12² × √100
= 15 + 144 × 10
= 15 + 1440
= 1455 ( A )

8) 6² × 9² - √6.400
= 36 × 81 - 80
= 2.916 - 80
= 2.836 ( A )

9) 30 = 2 × 3 × 5
40 = 2³ × 5
fpb = 2 × 5 = 10 ( C )

10) 09.00 + 12.00
= 21.00 ( D )