Good answer. I need 300 multiplication and division for 10 points

Good answer. I need 300 multiplication and division for 10 points

16－2×7＝ 91＋85－26＝ 2×2×2＝ 2×9×8＝3×8×8＝ 2÷1－0＝ 50＋2×8＝ 14＋11－25＝9×5×5＝ 90－81＋2＝ 85－83－1＝ 8×6＋79＝6÷2－2...

Third grade oral arithmetic

640 divide 8015 multiply 1523 multiply 312 multiply 2 multiply 5480 divide 8027 multiply 37600 divide 4001540 divide 5048 multiply 16200 multiply 7681000 divide 360500 divide 20 multiply 3085 multiply 14 multiply 2095 divide (65 minus 56) 120 add 36 multiply 4440 divide 4323 multiply 3540 divide 9990 divide 333 multiply 3344 multiply 4455 multiply 5566 multiply 6677 multiply 7788 multiply 8899 multiply 99310 multiply 30 multiply 37

Ask 50 third grade oral arithmetic questions, 50 points!
Give me 50 third grade mental arithmetic questions, ready-made, give 50 points!

17×40＝ 100－63＝ 3.2＋1.68＝ 2.8×0.4＝
14－7.4＝ 1.92÷0.04＝ 0.32×500＝ 0.65＋4.35＝
10－5.4＝ 4÷20＝ 3.5×200＝ 1.5－0.06＝
0.75÷15＝ 0.4×0.8＝ 4×0.25＝ 0.36＋1.54＝
1.01×99＝ 420÷35＝ 25×12＝ 135÷0.5＝
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17＝ 32.8＋19＝ 5.2÷1.3＝ 1.6×0.4＝
4.9×0.7＝ 1÷5＝ 6÷12＝ 0.87－0.49＝
2005-2006 third grade mathematics final review oral arithmetic problem (1)
70÷7= 20×10= 320÷5≈ 54×70≈ 251÷4≈ 6300÷7=
131÷4≈ 50×8= 85-45= 0÷5= 280÷4= 60×40=
840-30= 2700÷9= 99×31≈ 3.1＋2.7= 131÷4≈ 50×8=
7.8-1.8= 350÷5= 630÷9= 131÷6≈ 10×80= 65-56=
431÷6≈ 15×6= 4.8-0.4= 6.1＋0.7= 91×18≈ 257÷4≈
44÷4= 20×40= 210-30= 34+28 = 63- 63÷9= 120÷3×
2005-2006 third grade mathematics final review oral arithmetic problem (2)
800÷8= 40×70= 300÷4≈ 59×72≈ 251÷5≈ 630÷7=
131÷6≈ 0×108= 45-18= 0÷15= 120÷4= 30×40=
640-70= 1800÷9= 99×39≈ 5.1＋2.6= 411÷4≈ 15×20=
7.3-1.8= 250÷5= 6300÷9= 431÷6≈ 20×80= 78-56=
491÷8≈ 14×6= 4.8-4.4= 6.1＋4.7= 91×19≈ 367÷4≈
55÷5= 10×40= 211-30= 134+28 = 50×40-100= 12×20÷
2005-2006 third grade mathematics final review oral arithmetic problem (3)
Three years____ Class name______
270÷9= 20×11= 120÷5≈ 44×17≈ 351÷4≈ 420÷7=
231÷4≈ 50×80= 73-45= 0÷25= 1600÷4= 20×40=
840-32= 540÷9= 89×31≈ 0.1＋0.8= 371÷4≈ 0×28=
8.3-1.8= 2000÷5= 180÷9= 131÷6≈ 40×80= 85-51=
531÷6≈ 10×60-= 4.5-4.5= 6.8＋0.2= 41×19≈ 250÷4≈
270÷3= 11×50= 210-30= 68+28 = 25+25×2= 30÷3×10=
[center] [b] 2005-2006 third grade mathematics final review oral arithmetic questions (4) [/ b] [/ center]
Three years____ Class name______
100÷1= 30×70= 100÷5≈ 19×72≈ 251÷6≈ 140÷7=
234÷6≈ 120×0= 445-15= 0÷85= 200÷4= 300×40=
740-70= 2700÷9= 91×33≈ 4.1＋2.4= 419÷4≈ 14×20=
7.8-1.8= 1000÷5= 360÷9= 338÷6≈ 100×80= 98-56=
491÷8≈ 14×6= 4.1-3.1= 6.8＋0.7= 11×19≈ 167÷4≈
150÷5= 10×40= 100-30= 96+28 = 51+45-28= 10×20+34=
[center] [b] 2005-2006 third grade mathematics final review oral arithmetic (5) [/ b] [/ center]
Three years____ Class name______
70÷7= 20×10= 3200÷5≈ 54×70≈ 251÷4≈ 6300÷7=
131÷4≈ 50×8= 85-45= 0÷5= 280÷4= 60×40=
840-30= 2700÷9= 99×31≈ 3.1＋2.7= 131÷4≈ 50×8=
7.8-1.8= 350÷5= 630÷9= 131÷6≈ 10×80= 65-56=
431÷6≈ 15×6= 4.8-0.4= 6.1＋0.7= 91×18≈ 257÷4≈
44÷4= 20×40= 210-30= 34+28 = 63- 63÷9= 120÷3×20=
[center] [b] 2005-2006 third grade mathematics final review mental arithmetic problem (6) [/ b] [/ center]
Three years____ Class name______
800÷8= 40×70= 300÷5≈ 59×72≈ 251÷5≈ 630÷7=
131÷6≈ 0×108= 45-18= 0÷15= 120÷4= 30×40=
640-70= 1800÷9= 99×39≈ 5.1＋2.6= 411÷4≈ 15×20=
7.3-1.8= 250÷5= 6300÷9= 431÷6≈ 20×80= 78-56=
491÷8≈ 14×6= 4.8-4.4= 6.1＋4.7= 91×19≈ 367÷4≈
55÷5= 10×40= 211-30= 134+28 = 50×40-100= 12×20÷3=

What is abdication and carry addition and subtraction

33 + 18 = 51, carry plus (one full decimal)
51-18 = 33, abdication minus (one out of ten, one out of ten)

When Xiao Gang worked out a three digit minus three digit subtraction problem
When Xiao Gang worked out a three digit minus three digit subtraction problem, he wrote the three mistakes in the subtracted digit as 8, the zero mistakes in the subtracted digit as 6, and forgot to write the highest digit of the subtracted digit. The result is 199. How much should the original subtracted digit be?
The answer is 363, the analysis process

This guy is so careless
Simple number puzzle
_ _ 8 - 6 _ = 199
So the minus is 69
The subtracted is 268
Change 8 to 3
Hundreds plus N
It's one of 363463563663763863963

How to teach children the method of addition and subtraction in the first grade

There are special learning tools, which are suitable for low-level things, such as: sticks, spheres, cylinders, and letters for learning Chinese. All in all, there are all kinds of small cards. There are 10 yuan sets sold in the toy stores attached to the school. You can buy them and use them

How to develop a specific teaching method?

Children in kindergarten should teach fast mental arithmetic. Fast mental arithmetic is the only way to do simple arithmetic without any physical objects. Fast mental arithmetic is different from "abacus mental arithmetic" and "hand brain arithmetic". It doesn't use abacus or fingers
Fast mental arithmetic (oral arithmetic, mental arithmetic and written arithmetic) is the same as primary school mathematics
The patent teaching method of fast mental arithmetic (oral arithmetic, mental arithmetic and written arithmetic) is the best way for children to pass the exam

How to teach children's mathematics?

Hello! How old is your child? I can't tell you systematically. Because I don't know the age of the child. Let me just say as I just entered the park: 1. Learn to count. 2. Learn to count. 3. Know more or less than size. 4. Arrange by size. 51. Count to 100. Know that each number is 1 more than the previous one

How to teach preschool mathematics
For example, 5 + () = 9 or () - 4 = 6 makes it easy for children to understand

I think it can be more visualized. For example, if a child likes dolls, you can ask him 5 dolls + several dolls = 9 Dolls or something more realistic. It's better to have five apples to eat and one apple to leave

Kindergarten Mathematics Problems
1. The speed of a ship in still water is 15 kilometers per hour. It takes 8 hours to go from the upstream to the downstream. The water speed is 3 kilometers per hour. It takes () hours to return from the upstream to the downstream?

The speed down the water is per hour
15 + 3 = 18 km
What's the distance
18 × 8 = 144 km
The return speed is per hour
15-3 = 12 km
Return needs
144 △ 12 = 12 hours