What should be paid attention to when calculating decimal multiplication in vertical form

What should be paid attention to when calculating decimal multiplication in vertical form

Decimal addition calculation must be aligned with the decimal point
The calculation of decimal multiplication is based on the method of integer multiplication. First, align the last digit of the multiplier, and calculate the product according to the rule of integer multiplication. Then, look at how many decimal places there are in the multiplier, and count several decimal places from the right side of the product

Help me out 10 decimal multiplication vertical calculation fast!

1.2×4.3 4.9×2.6 7.4×7.1 4.5×4.1 1.8×7.1 8.9×7.5 9.4×4.6 7.2×1.8 6.7×6.7 2.7×9.4

The top five students of grade five applied questions in question bank (decimal multiplication)
I'm bored! Do you know the problem?
Page 20:
For a decimal, if you enlarge its decimal part by three times, the number will be 3.8. If you enlarge its decimal part by eight times, the number will be 6.8. What's the number?
Attention! Attention!
It's the expansion of the fractional part!
Don't be late!

This number is 2.6
(6.8-3.8)/(8-3)=0.6
You can double that to 0.6
Then 3.8-0.6 * (3-1) = 2.6

To multiply a decimal by an integer

240 mixed operations of decimal addition, subtraction and multiplication

12.65 + 3.5 = 85.6-3.21 = 12.65 + 3.5 = 85.6-3.21 = 12.65 + 7.5 = 83.6-4.35 = 12.65 + 7.5 = 83.6-4.35 = 32.7 + 7.52 = 55.6-5.75 = 32.7 + 7.52 = 55.6-5.75 = three, calculation, some can be simple to calculate: 89 × 99 + 89 2.63 + 5.8 + 7.37 + 4.252 × 15 -

Seek 30 decimal four mixed operations! Urgent!
There are 10 simple calculation and 20 equations brush points and irrigation roll!

1.1/3*(5*(2/3))
2.(1+37%)*20
3.35/2*75%
4.30*(50/2)
5.(54+10%)/20
6.(25/3*18)*30%
7.(2+70%)*40
8.1/7*(98*(1/4)*2)
9.25%*((23+2%)*4)
10.(30+20%)/2
11.12*3/(25+20%)
12.30/(3+40%)
13.27/8*16*10%
14.(2/3)*(3+6)*(1/2)
15.45*(1/9)*24
16.(35+10%)*27
17.(45+50%)*3*1/2
18.(43*20%)+(3*(1/9))
19.27*(9*(1/3))*5%
20.14*15%+25*8*(1/4)
21.7*(1/2)/49
22.(1+48%)*2
23.(4*8-12)*50%
24.(48/60%)/10
25.63*(1/7)*30%
26.(0.75+0.2)/0.25*25% 12/0.75+7.2/2.4
27.605*8+3.5-44 10.9-(6.6+0.125/12.5%)
28.980-9.8)*0.6-2.12 (0.125*8-0.5)*4
29.1+0.45/0.9-0.75 168.1/(4.3*2-0.4)
30.1.21*42-(4.46+0.14) 1375+450/18*25
31.18/1.5-0.5*0.3
32.1.9-1.9*(1.9-1.9)
Two more^-^

Four mixed operations of fractions and decimals: 50? (urgent) (fractions and decimals are in one problem)
3 / 7 times 0.9 divided by 1 / 4 plus 3 / 10

Out of 240 four mixed operation (decimal or fraction) fast

5.6×2.93.77×1.80.02×965.22×0.39.99×0.024.67×0.95×2.441.666×6.19.432×0.0025.6×6.54.88×2.95.61×4.38.9×2.45.5×559.77×0.021.384×5.18.78×832.6×610.059×0.24.268×1.757×5.79.46×2.8517.8...

Four mixed operations of decimals
How to calculate 3.333 × 3.333 6.3 △ 4.2

Help me find 40 decimal places, four mixed operations and their answers
Wait a minute

5
3168-7828÷38+504
796-5040÷（630÷7）
285+（3000-372）÷36
1+5/6-19/12
3x(-9)+7x(-9
(-54)x1/6x(-1/3)
1.18.1＋（3－0.299÷0.23）×1
2.(6.8-6.8×0.55)÷8.5
3.0.12× 4.8÷0.12×4.8
4.（3.2×1.5+2.5）÷1.6 （2）3.2×（1.5+2.5）÷1.6
5.6-1.6÷4= 5.38+7.85-5.37=
6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=
7.6.5×（4.8-1.2×4）= 0.68×1.9+0.32×1.9
8.10.15-10.75×0.4-5.7
9.5.8×（3.87-0.13）+4.2×3.74
10.32.52-（6+9.728÷3.2）×2.5
11.[（7.1-5.6）×0.9-1.15] ÷2.5
12.5.4÷[2.6×（3.7-2.9）+0.62]
13.12×6÷（12-7.2）-6
14.12×6÷7.2-6
15.33.02－（148.4－90.85）÷2.5