1) 7.8(6) + 2.3(6) - 5(6)= 46.8 + 13.8 - 30= 30.6
2) 2(0.3(4) + 5) + 1.4(4)= 2(1.2 + 5) + 5.6= 2(6.2) + 5.6= 12.4 + 5.6= 18
3) 6(1.5 + 1.5) - 2.8(1.5)= 6(3) - 4.2= 18 - 4.2= 13.8
4) 4(2.3 + 0.8) + 1.7(2.3)= 4(3.1) + 3.91= 12.4 + 3.91= 16.31
1) 7.8(6) + 2.3(6) - 5(6)
= 46.8 + 13.8 - 30
= 30.6
2) 2(0.3(4) + 5) + 1.4(4)
= 2(1.2 + 5) + 5.6
= 2(6.2) + 5.6
= 12.4 + 5.6
= 18
3) 6(1.5 + 1.5) - 2.8(1.5)
= 6(3) - 4.2
= 18 - 4.2
= 13.8
4) 4(2.3 + 0.8) + 1.7(2.3)
= 4(3.1) + 3.91
= 12.4 + 3.91
= 16.31