Question

计算下面各题（能简算的简算）8 1 8 ÷ 1 8 =6823-9987.1+0.9×（0.9-0.75）=6.72

计算下面各题（能简算的简算）8 1 8 ÷ 1 8 =6823-9987.1+0.9×（0.9-0.75）=6.72× 1 2 3 -4 1 3 ÷0.65 = 3.85×2 1 4 +0.15÷ 4 9 =（1.35÷0.3）× (1- 2 5 ) = 2 1 4 ÷[( 5 6 - 3 4 )×1.2+0.81] =

Answer 1

（1）8 1 8 ÷ 1 8 = 65 8 ×8 =65； （2）6823-998 =6823-1000+2 =5825； （3）7.1+0.9×（0.9-0.75） =7.1+0.9×0.15 =7.1+0.135 =7.235； （4）6.72× 1 2 3 -4 1 3 ÷0.65 =6.72× 5 3 - 13 3 × 20 13 = 56 5 - 20 3 = 68 15 ； （5）3.85× 2 1 4 +0.15 ÷ 4 9 =3.85× 9 4 +0.15× 9 4 =（3.85+0.15）× 9 4 =4× 9 4 =9； （6）（1.35÷0.3）×（1- 2 5 ） =4.5× 3 5 =2.7； （7）2 1 4 ÷[（ 5 6 - 3 4 ）×1.2+0.81] =2 1 4 ÷[ 5 6 ×1.2 - 3 4 ×1.2+0.81] =2 1 4 ÷[1-0.9+0.81] = 9 4 ÷ 91 100 = 225 91 ．