Answer:

1.) 78

2.) 11

3.) 10

4.) 10

SOLUTION:

1 (12 + 5) x 6-( 28 + 12÷3)

17 × 6 - 28 + 4

102 - 28. + 4

74. +4 = 78

2 (12+3)-6×2÷3

15 - 6×2÷3

15- 12÷3

15- 4 = 11

3 8+(6-1)÷5×2

8+ 5 ÷5×2

8+ 1 ×2

8+ 2 = 10

4 (10×24-20)÷22

240 -20)÷22

220 ÷ 22= 10

Step-by-step explanation:

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