| Category | Format | Size |
|---|---|---|
| Qingdao Edition Third Grade Mathematics Volume 1 | pptx | 6 MB |
"Kite Factory Insights" PPT courseware 5
Description
"Kite Factory Insights" PPT courseware 5
Review old knowledge
1. Oral calculation
80÷2=40 400÷4 =100
270÷3 = 90 20×7 =140 0÷9=0
2. Written calculation and verification
96÷8 =12 223÷2 =111……1
682÷ 6 =112 563÷4 =140…..3
Group work:
Based on the knowledge structure chart you compiled, discuss in the group what knowledge you learned about division in this unit?
Observe the pictures carefully
What mathematical information can you discern from the graph? Students have their say!
Can you ask some valuable mathematical questions?
raise questions
1. How many vats are needed today? (Estimate first and then calculate verbally)
84÷6≈15 (pieces)
Estimation method
When estimating, you can calculate the dividend as a whole ten or a hundred. Keep the divisor unchanged and use the basic method of oral division to calculate.
Student independent column solutions
84÷6=14 (pieces)
Oral calculation method
When dividing a number of tens or hundreds by a single digit, you can calculate the dividend as several tens or hundreds when calculating verbally, so that the obtained quotient is also several tens or hundreds.
Written calculation method
The divisor is a one-digit pen arithmetic division method. Divide from the highest digit of the dividend. If the highest digit of the dividend is smaller than the divisor, look at the first two digits of the dividend. Which digit of the dividend is divided, write the quotient in that digit. bit above, the remainder of each division must be smaller than the divisor.
Note: When the quotient of the dividend is not enough to be 1, the quotient of the dividend is 0.
The first level: Eat a fat man in one bite
(1) 40÷2= 42÷2= 420÷6 =
(2) 800÷4= 63÷3= 2100÷7=
Level 2: A master of pen calculation
920 ÷ 8 = 824 ÷ 4 =
720 ÷ 3 = 584 ÷ 5 =
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For more information about the PPT courseware "Kite Factory Insights", please click the Kite Factory Insights ppt tab.
"Kite Factory Insights" PPT courseware 4:
"Kite Factory Insights" PPT courseware 4 Small test of skills 1. Oral calculation 5005 402 307 09 1803 3208 560 7 240 4 2. Make vertical expressions and check 855= 716 6= 988= 563 5= 256+325= 523-345=. .. ... ... What questions can you ask? Required..
"Kite Factory Insights" PPT Courseware 3:
"Kite Factory Insights" PPT Courseware 3 How many kites do you need to make on average every day to complete the task on time? 602= () (only) Let’s divide one point 602= 30 (only) Divide the 6 tens into 2 equal parts, each part is 3 tens, which is 30. Because 302=60, so 602..
"Kite Factory Insights" PPT Courseware 2:
"Kite Factory Insights" PPT courseware 2 1. Oral calculation 4004=100 3208=40 1206=20 242=12 3609=40 4808=60 8008=100 6006=100 Oral calculation, compare who is the fastest 549... ... .. . It takes 6 bamboo sticks to build a kite. We made 63 kites in 3 hours...
File Info
Update Time: 2024-07-11
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