Simple calculation: 1 / 5 * 8 + 1 / 8 * 11 + 1 / 11 * 14 + +1\95*98+1\98*101

Simple calculation: 1 / 5 * 8 + 1 / 8 * 11 + 1 / 11 * 14 + +1\95*98+1\98*101

1/5*8+1/8*11+1/11* 14+… 1/95*98+1/98*101
=(1/5-1/8)/3+(1/8-1/11)+… (1/95-1/98)/3+(1/98-1/101)/3
=(1/5-1/101)/3=32/505

How to calculate the ratio of 6 / 23 to 17 / 6 × 1999

1999÷(6/23)-(17/6)×1999
=1999×(23/6-17/6)
=1999×1
=1999;
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Five numbers are 24:8, 7, 1, 14, 23, 6, 6, 8, 8, 17

（1）
(8+7-14+23)×1=24×1=24
（2）
（6+6+8-17）×8=3×8=24

Simple calculation: 1, (25 + 17) × 4 2, (160 + 40 △ 10) △ 4

1、（25＋17）×4
=25×4 +17×4
=100+68
=168
2、（160＋40÷10）÷4
=160÷4 + 4÷4
=40+1
=41