Calculation: 1 - (1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 + 1 / 32) = 1 / 32 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 = 100 I wrote the answer, help the process, see clearly

Calculation: 1 - (1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 + 1 / 32) = 1 / 32 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 = 100 I wrote the answer, help the process, see clearly

1 - (1 / 2 + 1 / 4 + 1 / 8 + 1 / 16 + 1 / 32)
=1-(16/32+8/32+4/32+2/32+1/32)
=1-31/32
=1/32
1+3+5+7+9+11+13+15+17+19
=(19+1)x10÷2
＝100

Take off formula calculation: 7 * 20 of 25 + 1 / 8 of 7 / 5, 4 of 7 / 5 of 16 + 1 of 40 * 15, 700 / 5 + 17 * 13, 3.14 * 7-0.9 * 0.5

7 out of 25 * 20 + 1 out of 7 / 5 out of 8
=28/5+8/35
=204/35
7 / 5 / 16 + 40 * 1 / 15
=35/64+8/3
=617/192
700/5+17*13
=140+221
=361
3.14*7-0.9*0.5
=21.98-0.45
=21.53

Simple operation; [1 / 6 + 2 / 3] / / 15 / 8 [important process]

[1 / 6 + 2 / 3] / 15 / 8
=（1/6+4/6）×(8/15)
=(5/6)×(8/15)
=4/9;
If you don't understand this question, you can ask,

Simple calculation: 1 / 7 × 9 / 13 ／ 5 / 14 ／ 3 / 13

1/7x9/13÷5/14÷3/13
=1 / 7x9 / 13x14 / 5x13 / 3
=(1 / 7x14 / 5) x (9 / 13x13 / 3) (commutative law of multiplication)
=2/5x3
=6/5

What is 486 divided by 54
Fourth grade exercises and tests page 5 question 3

486 divided by 54 = 9

What is 2A divided by a?

It's equal to 2

Simple calculation of 0.54 * 7.08

0.54*7.08
=0.54×（7+0.08）
=0.54×7+0.54×0.08
=3.78+0.0432
=3.8232

How to calculate (2.65 + 2.77) / (1.98-0.98)

(2.65+2.77)/(1.98-0.98）
=【2.62+（0.03+2.77）】/【（1+0.98）-0.98】
=【2.62+2.8】/【1-（0.98-0.98）】
=5.42/1
=5.42

Simple calculation of 7.98x10.1-0.798
fast

7.98x10.1--0.798=0.798x101--0.798
=0.798x(100+1)--0.798
=0.798x100+0.798--0.798
=0.798x100
=79.8.

Simple calculation of 6.7 × 0.98

6.7 ×0.98
=6.7×(1-0.02)
=6.7-0.134
=6.566