Posted by MONA on Monday, September 21, 2009 at 8:57pm.
What are your answers???
We'll be glad to check them for you.
1. 80+79+20=100+20+59=120+59=179
2. 308+95+5=300+100+8=400+8=408
3. 480+255+20=480+20+255=500+255=755
4. 523-198=500-200=300 AND 23+2=25 THUS 300+25=325
The first three are right.
You didn't do # 4.
Number 5 is correct.
Related Questions
GRADE 5 MATH - USE MENTAL MATH TO ADD OR SUBSTRACT: 1. 80+79+20 2. 308+95+5 3. ...
math - What is the selling price of a Television marked $600.00 if two discounts...
maths probability - In one version of the game Keno the house has a pot ...
6th grade math - use compatible numbers to estimate the quotient: 7.35/6 answer...
3rd grade math - how do you tell what compatible numbers you would use and theh ...
chemistry - calculate the empirical formula: 79.8%C and 20.2%H. what os the ...
math - how would i multiply 365/365 x 364/365 x 363/365...all the way to 326/365...
Math - use compatible number to estimate problem: 1,212 + 347 537 + 3,244 329 + ...
maths grade 05(nelson chapter 1 lesson 2.c) - Numbers of times recipe Numbers of...
Statistics - For a normal distribution with a mean of m = 80 and a standard ...
For Further Reading
