Topic 4

Topic 5

Division Algorithms
Compatible Numbers  used to estimate and check to see if your answer makes sense or is reasonable
Compatible numbers are numbers you can divide easily. You can use compatible numbers to estimate quotients. Change the dividend to a number close to the actual number but easily divisible by the divisor.
674/8 Think 8 x 80 = 640 so... 640 divided by 8 = 80
I think the answer to 674/8 will be close to 80
The actual answer is 84 R2
562/5 Think 5 x 110 = 550 so... 550 divided by 5 = 110
I think the answer to 562/5 will be close to 110 The actual answer is 112 R2
674/8 Think 8 x 80 = 640 so... 640 divided by 8 = 80
I think the answer to 674/8 will be close to 80
The actual answer is 84 R2
562/5 Think 5 x 110 = 550 so... 550 divided by 5 = 110
I think the answer to 562/5 will be close to 110 The actual answer is 112 R2
estimatequotients__compatible_numbers.ppt  
File Size:  720 kb 
File Type:  ppt 
division_patterns_and_estimating_quotients.pptx  
File Size:  74 kb 
File Type:  pptx 