Question

20道简便运算

20道简便运算

Answer 1

4.8×10.1 =4.8×10＋4.8×0.1 =48+0.48 =48.48
4.5×0.99 =4.5×1－4.5×0.01 =4.5－0.045 =4.455
3.4+3.4×99 =3.4×100 =340
187.7×11-187.7 =187.7×10 =1877
12×12/13 =12×13/13－12/13 =12－12/13 = 11又12/13
24×11/23 =11－1－1/23 =9又22/23
6/5-2/7+4/5-5/7 =(6/5+4/5)－（2/7＋5/7） =2－1 =1
1.3/7 × 49/9 - 4/3
2.8/9 × 15/36 + 1/27
3.12× 5/6 – 2/9 ×3
4.8× 5/4 + 1/4
5.6÷ 3/8 – 3/8 ÷6
6.4/7 × 5/9 + 3/7 × 5/9
7.5/2 -（ 3/2 + 4/5 ）
8.7/8 + （ 1/8 + 1/9 ）
9.9 × 5/6 + 5/6
10.3/4 × 8/9 - 1/3
11.7 × 5/49 + 3/14
12.6 ×（ 1/2 + 2/3 ）
13.8 × 4/5 + 8 × 11/5
14.31 × 5/6 – 5/6
15.9/7 - （ 2/7 – 10/21 ）
16.5/9 × 18 – 14 × 2/7
17.4/5 × 25/16 + 2/3 × 3/4
18.14 × 8/7 – 5/6 × 12/15
19.17/32 – 3/4 × 9/24
20.3 × 2/9 + 1/3

Answer 2

题目是啥呀？