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OpenStudy (maryfitzgerald14):
What can you add to 70 to make 90?
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Nnesha (nnesha):
do opposite way what is 90 - 70 = ??
OpenStudy (quickstudent):
You can find out simply by subtracting :90 - 70 = ?
OpenStudy (maryfitzgerald14):
isnt the answer 20
Nnesha (nnesha):
okay now check your answer 70 + 20 = ????
OpenStudy (maryfitzgerald14):
is it 90
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Nnesha (nnesha):
yes so that's right :)
OpenStudy (maryfitzgerald14):
ok thanks
OpenStudy (quickstudent):
correct:)
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