How to add the bracket 1.7 × 0.9 + 1.2 △ 0.3-0.2 = 48.8 to make the formula hold! 1.7×0.9+1.2÷0.3-0.2=48.8 2.7×0.9+1.2÷0.3-0.2=18.3 3.7×0.9+1.2÷0.3-0.2=75 4.7 × 0.9 + 1.2 △ 0.3-0.2 = 47.6, there are four,

How to add the bracket 1.7 × 0.9 + 1.2 △ 0.3-0.2 = 48.8 to make the formula hold! 1.7×0.9+1.2÷0.3-0.2=48.8 2.7×0.9+1.2÷0.3-0.2=18.3 3.7×0.9+1.2÷0.3-0.2=75 4.7 × 0.9 + 1.2 △ 0.3-0.2 = 47.6, there are four,

1.7×(0.9+1.2)÷0.3-0.2=48.8
2.7×0.9+1.2÷(0.3-0.2)=18.3
3.(7×0.9+1.2)÷(0.3-0.2)=75
4.7×[(0.9+1.2)÷0.3-0.2]=47.6