How to do the simple calculation of sixth grade scores?

1. Make full use of the law of intersection, combination and distribution
2. Make full use of reciprocal and opposite results 1 and 0
3. In addition and subtraction, the same parts can be combined together, and the whole can be combined together
4. In the division operation, we first transform the fraction with a band into a false fraction, and then invert the divisor and multiply it by the divisor
What can be reduced should be reduced as much as possible
5. According to the principle of step by step

42 simple operations of sixth grade scores
It should be clear at a glance,

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 ...

20 simple calculation questions of sixth grade fractions

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 ×...

12 / 3 + X (3 + X below, 12 above) = 15 / 30
Simple calculation: 34 × (1 / 17 + 1 / 13) × 13

12/(3+x)=15/30
12/(3+x)=1/2
3+x=12*2=24
x=21
34×（1/17+1/13）×13
=13X34X1/17+34X13X1/13
=13X2+34X1
=26+34
=60

Simple calculation: 8 / 3.14 × 15 + 7 / 3.14 × 15-3.14
To simplify the calculation,

Mathematical answer group for you to answer, I hope to help you
3.14 × 8 / 15 + 3.14 × 7 / 15-3.14
=3.14 × (8 / 15 + 7 / 15-1)
=3.14×0
=0

Simple calculation 9 / 22 △ 15

Original formula = (9 / 22) * (1 / 15) = (3 / 22) * (1 / 5) = 3 / 110

5 / 6 + (7 / 15-9 / 20) simple calculation

5/6+(7/15-9/20)
=50/60+28/60-27/60
=50/60+1/60
=51/60
=17/20
If you don't understand this question, you can ask,

How to calculate 5 / 9-7 / 15 * 5 / 7-2 / 3

5/9-7/15*5/7-2/3
=5／9－1／3－2/3
=5／9－（1／3＋2／3）
=5／9－1
=﹣4／9

100 points for correct answer: 15 × 23 × 4

Solution; = 5 × 3 × 23 × 4
=（5×4）×（23×3）
=100×69
=6900

= / 21 × 25 and / 25 × 20?

9/20×5/21
=3/(4×7)
=3/28;
And 7 / 25 × 15 / 14
=3/(5×2)
=3/10;
Detailed calculation
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How to do the simple calculation of sixth grade scores?