1.

15 × 12 + 40 ÷ 40 - 6 = 211). + and ×2). + and ÷3). - and +4). ÷ and ×

Answer»

Given EQUATION: 15 × 12 + 40 ÷ 40 - 6 = 21

After INTERCHANGING ‘+ and × ’ we get:

15 + 12 × 40 ÷ 40 - 6 = 21

L.H.S of equation: 15 + 12 × 40 ÷ 40 - 6

→ 15 + 12 × 1 - 6

→ 15 + 12 - 6

→ 15 + 6

→ 21 = R.H.S

Hence, answer is ‘+ and × ’.


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