Asked by MONA
USE MENTAL MATH TO ADD OR SUBSTRACT: USING COMPATIBLE NUMBERS
1. 80+79+20
2. 308+95+5
3. 480+255+20
4.365+289
5. 523-198
6. 537+180
7. 325+239+75
8. 87+38+62
9. 4500-280
1. 80+79+20
2. 308+95+5
3. 480+255+20
4.365+289
5. 523-198
6. 537+180
7. 325+239+75
8. 87+38+62
9. 4500-280
Answers
Answered by
Ms. Sue
What are your answers???
We'll be glad to check them for you.
We'll be glad to check them for you.
Answered by
MONA
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
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
Answered by
Ms. Sue
The first three are right.
You didn't do # 4.
Number 5 is correct.
You didn't do # 4.
Number 5 is correct.
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